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                  "level": 4
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                  "level": 4
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                  "label": "Sonar",
                  "level": 4
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                  "label": "Transistor types",
                  "level": 4
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                  "level": 4
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                  "level": 4
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                  "level": 4
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                  "level": 4
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                  "id": "01030307 Aeolis quadrangle",
                  "label": "Aeolis quadrangle",
                  "level": 4
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                  "level": 4
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                  "level": 4
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                  "level": 4
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              "label": "fluids & plasmas",
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                  "id": "01030902 Nonlinear optics",
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                  "level": 4
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                  "code": "01030904",
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                  "level": 4
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                  "code": "01040205",
                  "id": "01040205 Ionic liquids/Ions",
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                  "level": 4
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                  "code": "01040206",
                  "id": "01040206 Chemical synthesis/Total synthesis",
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                  "level": 4
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                {
                  "code": "01040207",
                  "id": "01040207 Fuel cells/Hydrogen economy",
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                  "level": 4
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                  "code": "01040208",
                  "id": "01040208 Ligands/Chemical bonding",
                  "label": "Ligands/Chemical bonding",
                  "level": 4
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                  "code": "01040209",
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                  "level": 4
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                  "code": "01040210",
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                  "level": 4
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              "code": "010403",
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              "label": "inorganic & nuclear chemistry",
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                  "label": "Radioactivity/Medicinal radiochemistry",
                  "level": 4
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                {
                  "code": "01040302",
                  "id": "01040302 Redox",
                  "label": "Redox",
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                  "id": "01040402 Psidium/Ficus",
                  "label": "Psidium/Ficus",
                  "level": 4
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                {
                  "code": "01040403",
                  "id": "01040403 Acetylcholine",
                  "label": "Acetylcholine",
                  "level": 4
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                  "code": "01040404",
                  "id": "01040404 Botany/Herbalism",
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                  "level": 4
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                {
                  "code": "01040503",
                  "id": "01040503 Biological oceanography/Marine biology",
                  "label": "Biological oceanography/Marine biology",
                  "level": 4
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                {
                  "code": "01040504",
                  "id": "01040504 Functional groups/Ethers",
                  "label": "Functional groups/Ethers",
                  "level": 4
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                  "code": "01040505",
                  "id": "01040505 Functional groups/Tuberculosis",
                  "label": "Functional groups/Tuberculosis",
                  "level": 4
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                {
                  "code": "01040506",
                  "id": "01040506 Physical organic chemistry/Cheminformatics",
                  "label": "Physical organic chemistry/Cheminformatics",
                  "level": 4
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                  "code": "01040507",
                  "id": "01040507 Biopesticides",
                  "label": "Biopesticides",
                  "level": 4
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                  "code": "01040509",
                  "id": "01040509 Chemical synthesis/Organic synthesis",
                  "label": "Chemical synthesis/Organic synthesis",
                  "level": 4
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              "code": "010406",
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              "label": "physical chemistry",
              "level": 3
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              "code": "010407",
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              "label": "polymers",
              "level": 3,
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                  "level": 4
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                {
                  "code": "01050406",
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                  "label": "Holocene",
                  "level": 4
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                  "code": "01050603",
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                  "level": 4
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                {
                  "code": "01060306",
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                  "label": "IUCN Red List least concern species/Holarctic fauna",
                  "level": 4
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                {
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                {
                  "code": "01060605",
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                  "code": "03010601",
                  "id": "03010601 Food safety/Foodborne illnesses",
                  "label": "Food safety/Foodborne illnesses",
                  "level": 4
                },
                {
                  "code": "03010602",
                  "id": "03010602 Tuberculosis/Health in Africa",
                  "label": "Tuberculosis/Health in Africa",
                  "level": 4
                },
                {
                  "code": "03010603",
                  "id": "03010603 Fungal diseases/Aspergillus",
                  "label": "Fungal diseases/Aspergillus",
                  "level": 4
                },
                {
                  "code": "03010604",
                  "id": "03010604 Antimicrobial resistance/Evolutionary biology",
                  "label": "Antimicrobial resistance/Evolutionary biology",
                  "level": 4
                },
                {
                  "code": "03010605",
                  "id": "03010605 Health care/Health care quality",
                  "label": "Health care/Health care quality",
                  "level": 4
                },
                {
                  "code": "03010606",
                  "id": "03010606 Bacteriology/Bacteria",
                  "label": "Bacteriology/Bacteria",
                  "level": 4
                }
              ]
            },
            {
              "code": "030107",
              "id": "030107 microscopy",
              "label": "microscopy",
              "level": 3
            },
            {
              "code": "030108",
              "id": "030108 mycology & parasitology",
              "label": "mycology & parasitology",
              "level": 3,
              "children": [
                {
                  "code": "03010801",
                  "id": "03010801 Mycology/Symbiosis",
                  "label": "Mycology/Symbiosis",
                  "level": 4
                },
                {
                  "code": "03010802",
                  "id": "03010802 Domesticated animals/Livestock",
                  "label": "Domesticated animals/Livestock",
                  "level": 4
                },
                {
                  "code": "03010803",
                  "id": "03010803 Digenea/Disease ecology",
                  "label": "Digenea/Disease ecology",
                  "level": 4
                }
              ]
            },
            {
              "code": "030109",
              "id": "030109 nutrition & dietetics",
              "label": "nutrition & dietetics",
              "level": 3,
              "children": [
                {
                  "code": "03010901",
                  "id": "03010901 Nutrition by type/Dietary supplements",
                  "label": "Nutrition by type/Dietary supplements",
                  "level": 4
                },
                {
                  "code": "03010902",
                  "id": "03010902 Polyphenols/Nutrition",
                  "label": "Polyphenols/Nutrition",
                  "level": 4
                },
                {
                  "code": "03010903",
                  "id": "03010903 Cooking fats/Margarine brands",
                  "label": "Cooking fats/Margarine brands",
                  "level": 4
                }
              ]
            },
            {
              "code": "030110",
              "id": "030110 physiology",
              "label": "physiology",
              "level": 3,
              "children": [
                {
                  "code": "03011001",
                  "id": "03011001 Cardiovascular physiology/Human anatomy by organ",
                  "label": "Cardiovascular physiology/Human anatomy by organ",
                  "level": 4
                }
              ]
            },
            {
              "code": "030111",
              "id": "030111 toxicology",
              "label": "toxicology",
              "level": 3
            },
            {
              "code": "030112",
              "id": "030112 virology",
              "label": "virology",
              "level": 3
            }
          ]
        },
        {
          "code": "0302",
          "id": "0302 clinical medicine",
          "label": "clinical medicine",
          "level": 2,
          "children": [
            {
              "code": "030201",
              "id": "030201 allergy",
              "label": "allergy",
              "level": 3
            },
            {
              "code": "030202",
              "id": "030202 anesthesiology",
              "label": "anesthesiology",
              "level": 3,
              "children": [
                {
                  "code": "03020201",
                  "id": "03020201 Anesthesia/Anesthesiology",
                  "label": "Anesthesia/Anesthesiology",
                  "level": 4
                },
                {
                  "code": "03020202",
                  "id": "03020202 Orthopedic surgical procedures/Implants (medicine)",
                  "label": "Orthopedic surgical procedures/Implants (medicine)",
                  "level": 4
                }
              ]
            },
            {
              "code": "030203",
              "id": "030203 arthritis & rheumatology",
              "label": "arthritis & rheumatology",
              "level": 3,
              "children": [
                {
                  "code": "03020301",
                  "id": "03020301 Rare diseases/Cognitive disorders",
                  "label": "Rare diseases/Cognitive disorders",
                  "level": 4
                },
                {
                  "code": "03020302",
                  "id": "03020302 Rheumatology/Arthritis",
                  "label": "Rheumatology/Arthritis",
                  "level": 4
                },
                {
                  "code": "03020303",
                  "id": "03020303 Autoimmune diseases/Rheumatology",
                  "label": "Autoimmune diseases/Rheumatology",
                  "level": 4
                },
                {
                  "code": "03020304",
                  "id": "03020304 Inflammations/Kidney diseases",
                  "label": "Inflammations/Kidney diseases",
                  "level": 4
                },
                {
                  "code": "03020305",
                  "id": "03020305 Arthritis/Skeletal disorders",
                  "label": "Arthritis/Skeletal disorders",
                  "level": 4
                }
              ]
            },
            {
              "code": "030204",
              "id": "030204 cardiovascular system & hematology",
              "label": "cardiovascular system & hematology",
              "level": 3,
              "children": [
                {
                  "code": "03020401",
                  "id": "03020401 Aging-associated diseases/Heart diseases",
                  "label": "Aging-associated diseases/Heart diseases",
                  "level": 4
                },
                {
                  "code": "03020402",
                  "id": "03020402 Hypertension/Pulmonary heart disease and diseases of pulmonary circulation",
                  "label": "Hypertension/Pulmonary heart disease and diseases of pulmonary circulation",
                  "level": 4
                },
                {
                  "code": "03020403",
                  "id": "03020403 Lipid disorders/Cardiology",
                  "label": "Lipid disorders/Cardiology",
                  "level": 4
                },
                {
                  "code": "03020404",
                  "id": "03020404 Stroke/Vascular diseases",
                  "label": "Stroke/Vascular diseases",
                  "level": 4
                },
                {
                  "code": "03020405",
                  "id": "03020405 Hematology/Coagulopathies",
                  "label": "Hematology/Coagulopathies",
                  "level": 4
                },
                {
                  "code": "03020406",
                  "id": "03020406 Kidney diseases/Organ failure",
                  "label": "Kidney diseases/Organ failure",
                  "level": 4
                },
                {
                  "code": "03020407",
                  "id": "03020407 Vascular surgery/Diseases of the aorta",
                  "label": "Vascular surgery/Diseases of the aorta",
                  "level": 4
                },
                {
                  "code": "03020408",
                  "id": "03020408 Cardiac imaging/Medical imaging",
                  "label": "Cardiac imaging/Medical imaging",
                  "level": 4
                },
                {
                  "code": "03020409",
                  "id": "03020409 Implants (medicine)/Prosthetics",
                  "label": "Implants (medicine)/Prosthetics",
                  "level": 4
                }
              ]
            },
            {
              "code": "030205",
              "id": "030205 complementary & alternative medicine",
              "label": "complementary & alternative medicine",
              "level": 3
            },
            {
              "code": "030206",
              "id": "030206 dentistry",
              "label": "dentistry",
              "level": 3,
              "children": [
                {
                  "code": "03020601",
                  "id": "03020601 Pathology of temporomandibular joints, muscles of mastication and associated structures/Musculoskeletal disorders",
                  "label": "Pathology of temporomandibular joints, muscles of mastication and associated structures/Musculoskeletal disorders",
                  "level": 4
                },
                {
                  "code": "03020602",
                  "id": "03020602 Dental materials/Restorative dentistry",
                  "label": "Dental materials/Restorative dentistry",
                  "level": 4
                },
                {
                  "code": "03020603",
                  "id": "03020603 Periodontal disorders/Inflammations",
                  "label": "Periodontal disorders/Inflammations",
                  "level": 4
                },
                {
                  "code": "03020604",
                  "id": "03020604 Dentistry occupations/Dentistry",
                  "label": "Dentistry occupations/Dentistry",
                  "level": 4
                },
                {
                  "code": "03020605",
                  "id": "03020605 Oral mucosal pathology/Conditions of the mucous membranes",
                  "label": "Oral mucosal pathology/Conditions of the mucous membranes",
                  "level": 4
                },
                {
                  "code": "03020606",
                  "id": "03020606 Endodontics/Dentistry",
                  "label": "Endodontics/Dentistry",
                  "level": 4
                },
                {
                  "code": "03020607",
                  "id": "03020607 Endodontics/Dental equipment",
                  "label": "Endodontics/Dental equipment",
                  "level": 4
                }
              ]
            },
            {
              "code": "030207",
              "id": "030207 dermatology & venereal diseases",
              "label": "dermatology & venereal diseases",
              "level": 3,
              "children": [
                {
                  "code": "03020701",
                  "id": "03020701 Cutaneous conditions/Autoimmune diseases",
                  "label": "Cutaneous conditions/Autoimmune diseases",
                  "level": 4
                },
                {
                  "code": "03020702",
                  "id": "03020702 Skin conditions resulting from physical factors",
                  "label": "Skin conditions resulting from physical factors",
                  "level": 4
                },
                {
                  "code": "03020703",
                  "id": "03020703 Light therapy/Circadian rhythm",
                  "label": "Light therapy/Circadian rhythm",
                  "level": 4
                }
              ]
            },
            {
              "code": "030208",
              "id": "030208 emergency & critical care medicine",
              "label": "emergency & critical care medicine",
              "level": 3,
              "children": [
                {
                  "code": "03020801",
                  "id": "03020801 Burns/Acute pain",
                  "label": "Burns/Acute pain",
                  "level": 4
                },
                {
                  "code": "03020802",
                  "id": "03020802 Emergency medicine/Hospital departments",
                  "label": "Emergency medicine/Hospital departments",
                  "level": 4
                },
                {
                  "code": "03020803",
                  "id": "03020803 Medical emergencies/Trauma types",
                  "label": "Medical emergencies/Trauma types",
                  "level": 4
                },
                {
                  "code": "03020804",
                  "id": "03020804 Medical emergencies/Traumatology",
                  "label": "Medical emergencies/Traumatology",
                  "level": 4
                }
              ]
            },
            {
              "code": "030209",
              "id": "030209 endocrinology & metabolism",
              "label": "endocrinology & metabolism",
              "level": 3,
              "children": [
                {
                  "code": "03020901",
                  "id": "03020901 Diabetes/Insulin therapies",
                  "label": "Diabetes/Insulin therapies",
                  "level": 4
                },
                {
                  "code": "03020902",
                  "id": "03020902 Endocrine-related cutaneous conditions/Neuroendocrinology",
                  "label": "Endocrine-related cutaneous conditions/Neuroendocrinology",
                  "level": 4
                },
                {
                  "code": "03020903",
                  "id": "03020903 Osteopathies/Skeletal system",
                  "label": "Osteopathies/Skeletal system",
                  "level": 4
                },
                {
                  "code": "03020904",
                  "id": "03020904 Thyroid disease/Thyroid",
                  "label": "Thyroid disease/Thyroid",
                  "level": 4
                },
                {
                  "code": "03020905",
                  "id": "03020905 Bariatrics/Digestive system surgery",
                  "label": "Bariatrics/Digestive system surgery",
                  "level": 4
                },
                {
                  "code": "03020906",
                  "id": "03020906 Obesity/Bariatrics",
                  "label": "Obesity/Bariatrics",
                  "level": 4
                }
              ]
            },
            {
              "code": "030210",
              "id": "030210 environmental & occupational health",
              "label": "environmental & occupational health",
              "level": 3,
              "children": [
                {
                  "code": "03021001",
                  "id": "03021001 Asbestos/Industrial and organizational psychology",
                  "label": "Asbestos/Industrial and organizational psychology",
                  "level": 4
                }
              ]
            },
            {
              "code": "030211",
              "id": "030211 gastroenterology & hepatology",
              "label": "gastroenterology & hepatology",
              "level": 3,
              "children": [
                {
                  "code": "03021108",
                  "id": "03021108 Bariatrics/Digestive system surgery",
                  "label": "Bariatrics/Digestive system surgery",
                  "level": 4
                },
                {
                  "code": "03021101",
                  "id": "03021101 Autoimmune diseases/Inflammations",
                  "label": "Autoimmune diseases/Inflammations",
                  "level": 4
                },
                {
                  "code": "03021102",
                  "id": "03021102 Clinical research/Design of experiments",
                  "label": "Clinical research/Design of experiments",
                  "level": 4
                },
                {
                  "code": "03021103",
                  "id": "03021103 Endoscopy/Diagnostic gastroenterology",
                  "label": "Endoscopy/Diagnostic gastroenterology",
                  "level": 4
                },
                {
                  "code": "03021104",
                  "id": "03021104 Hepatology/Biliary tract disorders",
                  "label": "Hepatology/Biliary tract disorders",
                  "level": 4
                },
                {
                  "code": "03021105",
                  "id": "03021105 Proton-pump inhibitors/World Health Organization essential medicines",
                  "label": "Proton-pump inhibitors/World Health Organization essential medicines",
                  "level": 4
                },
                {
                  "code": "03021106",
                  "id": "03021106 Conditions diagnosed by stool test/Diarrhea",
                  "label": "Conditions diagnosed by stool test/Diarrhea",
                  "level": 4
                },
                {
                  "code": "03021107",
                  "id": "03021107 Organ transplantation/Diseases of liver",
                  "label": "Organ transplantation/Diseases of liver",
                  "level": 4
                }
              ]
            },
            {
              "code": "030212",
              "id": "030212 general & internal medicine",
              "label": "general & internal medicine",
              "level": 3,
              "children": [
                {
                  "code": "03021207",
                  "id": "03021207 Substance-related disorders/Substance dependence",
                  "label": "Substance-related disorders/Substance dependence",
                  "level": 4
                },
                {
                  "code": "03021208",
                  "id": "03021208 Health care/Health care quality",
                  "label": "Health care/Health care quality",
                  "level": 4
                },
                {
                  "code": "03021201",
                  "id": "03021201 Intensive care medicine/Hospital departments",
                  "label": "Intensive care medicine/Hospital departments",
                  "level": 4
                },
                {
                  "code": "03021202",
                  "id": "03021202 Drugs that are a vaccine",
                  "label": "Drugs that are a vaccine",
                  "level": 4
                },
                {
                  "code": "03021203",
                  "id": "03021203 Gerontology/Old age",
                  "label": "Gerontology/Old age",
                  "level": 4
                },
                {
                  "code": "03021204",
                  "id": "03021204 Health care quality/Health care",
                  "label": "Health care quality/Health care",
                  "level": 4
                },
                {
                  "code": "03021205",
                  "id": "03021205 Diets/Food and the environment",
                  "label": "Diets/Food and the environment",
                  "level": 4
                },
                {
                  "code": "03021206",
                  "id": "03021206 Caregiving/Hospice",
                  "label": "Caregiving/Hospice",
                  "level": 4
                },
                {
                  "code": "03021209",
                  "id": "03021209 Antiviral drugs/Biocides",
                  "label": "Antiviral drugs/Biocides",
                  "level": 4
                }
              ]
            },
            {
              "code": "030213",
              "id": "030213 general clinical medicine",
              "label": "general clinical medicine",
              "level": 3,
              "children": [
                {
                  "code": "03021301",
                  "id": "03021301 Clinical pathology/Health care occupations",
                  "label": "Clinical pathology/Health care occupations",
                  "level": 4
                }
              ]
            },
            {
              "code": "030214",
              "id": "030214 geriatrics",
              "label": "geriatrics",
              "level": 3
            },
            {
              "code": "030215",
              "id": "030215 immunology",
              "label": "immunology",
              "level": 3,
              "children": [
                {
                  "code": "03021501",
                  "id": "03021501 Stem cells/Transplantation medicine",
                  "label": "Stem cells/Transplantation medicine",
                  "level": 4
                },
                {
                  "code": "03021502",
                  "id": "03021502 Immune system/Human cells",
                  "label": "Immune system/Human cells",
                  "level": 4
                }
              ]
            },
            {
              "code": "030216",
              "id": "030216 legal & forensic medicine",
              "label": "legal & forensic medicine",
              "level": 3,
              "children": [
                {
                  "code": "03021601",
                  "id": "03021601 Forensic disciplines/Forensic science",
                  "label": "Forensic disciplines/Forensic science",
                  "level": 4
                }
              ]
            },
            {
              "code": "030217",
              "id": "030217 neurology & neurosurgery",
              "label": "neurology & neurosurgery",
              "level": 3,
              "children": [
                {
                  "code": "03021701",
                  "id": "03021701 Mood disorders",
                  "label": "Mood disorders",
                  "level": 4
                },
                {
                  "code": "03021702",
                  "id": "03021702 Sleep disorders/Sleep physiology",
                  "label": "Sleep disorders/Sleep physiology",
                  "level": 4
                },
                {
                  "code": "03021703",
                  "id": "03021703 Brain/Neural circuits",
                  "label": "Brain/Neural circuits",
                  "level": 4
                },
                {
                  "code": "03021704",
                  "id": "03021704 Neurotrauma/Spinal cord disorders",
                  "label": "Neurotrauma/Spinal cord disorders",
                  "level": 4
                },
                {
                  "code": "03021705",
                  "id": "03021705 Audiology/Hearing",
                  "label": "Audiology/Hearing",
                  "level": 4
                },
                {
                  "code": "03021706",
                  "id": "03021706 Pain/Chronic pain syndromes",
                  "label": "Pain/Chronic pain syndromes",
                  "level": 4
                },
                {
                  "code": "03021707",
                  "id": "03021707 Aging-associated diseases/Cognitive disorders",
                  "label": "Aging-associated diseases/Cognitive disorders",
                  "level": 4
                },
                {
                  "code": "03021708",
                  "id": "03021708 Neurotrauma/Stroke",
                  "label": "Neurotrauma/Stroke",
                  "level": 4
                },
                {
                  "code": "03021709",
                  "id": "03021709 Proteoglycan metabolism disorders/Autosomal recessive disorders",
                  "label": "Proteoglycan metabolism disorders/Autosomal recessive disorders",
                  "level": 4
                }
              ]
            },
            {
              "code": "030218",
              "id": "030218 nuclear medicine & medical imaging",
              "label": "nuclear medicine & medical imaging",
              "level": 3,
              "children": [
                {
                  "code": "03021807",
                  "id": "03021807 Medical imaging/Medical physics",
                  "label": "Medical imaging/Medical physics",
                  "level": 4
                },
                {
                  "code": "03021801",
                  "id": "03021801 Magnetic resonance imaging/Biomagnetics",
                  "label": "Magnetic resonance imaging/Biomagnetics",
                  "level": 4
                },
                {
                  "code": "03021802",
                  "id": "03021802 Radiology/Medical imaging",
                  "label": "Radiology/Medical imaging",
                  "level": 4
                },
                {
                  "code": "03021803",
                  "id": "03021803 Interventional radiology/Surgery",
                  "label": "Interventional radiology/Surgery",
                  "level": 4
                },
                {
                  "code": "03021804",
                  "id": "03021804 Prostate cancer/Male genital surgery",
                  "label": "Prostate cancer/Male genital surgery",
                  "level": 4
                },
                {
                  "code": "03021805",
                  "id": "03021805 Radiology/Image segmentation",
                  "label": "Radiology/Image segmentation",
                  "level": 4
                },
                {
                  "code": "03021806",
                  "id": "03021806 Radiobiology/Radiation health effects",
                  "label": "Radiobiology/Radiation health effects",
                  "level": 4
                }
              ]
            },
            {
              "code": "030219",
              "id": "030219 obstetrics & reproductive medicine",
              "label": "obstetrics & reproductive medicine",
              "level": 3,
              "children": [
                {
                  "code": "03021901",
                  "id": "03021901 Fertility medicine/Fertility",
                  "label": "Fertility medicine/Fertility",
                  "level": 4
                },
                {
                  "code": "03021902",
                  "id": "03021902 Health issues in pregnancy/Midwifery",
                  "label": "Health issues in pregnancy/Midwifery",
                  "level": 4
                },
                {
                  "code": "03021903",
                  "id": "03021903 Menstrual cycle/Noninflammatory disorders of female genital tract",
                  "label": "Menstrual cycle/Noninflammatory disorders of female genital tract",
                  "level": 4
                },
                {
                  "code": "03021904",
                  "id": "03021904 Urological conditions/Urinary incontinence",
                  "label": "Urological conditions/Urinary incontinence",
                  "level": 4
                }
              ]
            },
            {
              "code": "030220",
              "id": "030220 oncology & carcinogenesis",
              "label": "oncology & carcinogenesis",
              "level": 3,
              "children": [
                {
                  "code": "03022001",
                  "id": "03022001 Biomarkers/Biotechnology",
                  "label": "Biomarkers/Biotechnology",
                  "level": 4
                },
                {
                  "code": "03022002",
                  "id": "03022002 Simple aromatic rings/Aromatic bases",
                  "label": "Simple aromatic rings/Aromatic bases",
                  "level": 4
                },
                {
                  "code": "03022003",
                  "id": "03022003 Radiation therapy procedures/Medical physics",
                  "label": "Radiation therapy procedures/Medical physics",
                  "level": 4
                },
                {
                  "code": "03022004",
                  "id": "03022004 Thyroid disease/Pancreatic cancer",
                  "label": "Thyroid disease/Pancreatic cancer",
                  "level": 4
                },
                {
                  "code": "03022005",
                  "id": "03022005 Oncology/Infectious causes of cancer",
                  "label": "Oncology/Infectious causes of cancer",
                  "level": 4
                },
                {
                  "code": "03022006",
                  "id": "03022006 Gynaecological cancer/Oncology",
                  "label": "Gynaecological cancer/Oncology",
                  "level": 4
                },
                {
                  "code": "03022007",
                  "id": "03022007 Pediatric cancers/Anatomical pathology",
                  "label": "Pediatric cancers/Anatomical pathology",
                  "level": 4
                },
                {
                  "code": "03022008",
                  "id": "03022008 Respiratory diseases principally affecting the interstitium/Pulmonary heart disease and diseases of pulmonary circulation",
                  "label": "Respiratory diseases principally affecting the interstitium/Pulmonary heart disease and diseases of pulmonary circulation",
                  "level": 4
                },
                {
                  "code": "03022009",
                  "id": "03022009 Dietary supplements/Nutrition by type",
                  "label": "Dietary supplements/Nutrition by type",
                  "level": 4
                },
                {
                  "code": "03022010",
                  "id": "03022010 Biomarkers/Stool tests",
                  "label": "Biomarkers/Stool tests",
                  "level": 4
                },
                {
                  "code": "03022011",
                  "id": "03022011 Infectious causes of cancer/Digestive system neoplasia",
                  "label": "Infectious causes of cancer/Digestive system neoplasia",
                  "level": 4
                },
                {
                  "code": "03022012",
                  "id": "03022012 Digestive system surgery/Surgery",
                  "label": "Digestive system surgery/Surgery",
                  "level": 4
                },
                {
                  "code": "03022013",
                  "id": "03022013 Medical imaging/Medical physics",
                  "label": "Medical imaging/Medical physics",
                  "level": 4
                }
              ]
            },
            {
              "code": "030221",
              "id": "030221 ophthalmology & optometry",
              "label": "ophthalmology & optometry",
              "level": 3,
              "children": [
                {
                  "code": "03022101",
                  "id": "03022101 Human eye anatomy/Blindness",
                  "label": "Human eye anatomy/Blindness",
                  "level": 4
                }
              ]
            },
            {
              "code": "030222",
              "id": "030222 orthopedics",
              "label": "orthopedics",
              "level": 3,
              "children": [
                {
                  "code": "03022201",
                  "id": "03022201 Bone fractures/Acute pain",
                  "label": "Bone fractures/Acute pain",
                  "level": 4
                },
                {
                  "code": "03022202",
                  "id": "03022202 Joints/Upper limb anatomy",
                  "label": "Joints/Upper limb anatomy",
                  "level": 4
                },
                {
                  "code": "03022203",
                  "id": "03022203 Drug discovery/Health policy",
                  "label": "Drug discovery/Health policy",
                  "level": 4
                },
                {
                  "code": "03022204",
                  "id": "03022204 Childhood/Pediatrics",
                  "label": "Childhood/Pediatrics",
                  "level": 4
                },
                {
                  "code": "03022205",
                  "id": "03022205 Orthopedic surgical procedures/Prosthetics",
                  "label": "Orthopedic surgical procedures/Prosthetics",
                  "level": 4
                },
                {
                  "code": "03022206",
                  "id": "03022206 Shoulder/Injuries of shoulder and upper arm",
                  "label": "Shoulder/Injuries of shoulder and upper arm",
                  "level": 4
                }
              ]
            },
            {
              "code": "030223",
              "id": "030223 otorhinolaryngology",
              "label": "otorhinolaryngology",
              "level": 3,
              "children": [
                {
                  "code": "03022301",
                  "id": "03022301 Nose disorders/Audiology",
                  "label": "Nose disorders/Audiology",
                  "level": 4
                },
                {
                  "code": "03022302",
                  "id": "03022302 Otorhinolaryngology/Oral and maxillofacial surgery",
                  "label": "Otorhinolaryngology/Oral and maxillofacial surgery",
                  "level": 4
                }
              ]
            },
            {
              "code": "030224",
              "id": "030224 pathology",
              "label": "pathology",
              "level": 3
            },
            {
              "code": "030225",
              "id": "030225 pediatrics",
              "label": "pediatrics",
              "level": 3,
              "children": [
                {
                  "code": "03022501",
                  "id": "03022501 Puberty/Adolescent medicine",
                  "label": "Puberty/Adolescent medicine",
                  "level": 4
                },
                {
                  "code": "03022502",
                  "id": "03022502 Neonatology/Preterm birth",
                  "label": "Neonatology/Preterm birth",
                  "level": 4
                },
                {
                  "code": "03022503",
                  "id": "03022503 Autoimmune diseases/Multiple sclerosis",
                  "label": "Autoimmune diseases/Multiple sclerosis",
                  "level": 4
                },
                {
                  "code": "03022504",
                  "id": "03022504 Hearing loss/Audiology",
                  "label": "Hearing loss/Audiology",
                  "level": 4
                },
                {
                  "code": "03022505",
                  "id": "03022505 Abdominal pain/Conditions diagnosed by stool test",
                  "label": "Abdominal pain/Conditions diagnosed by stool test",
                  "level": 4
                },
                {
                  "code": "03022506",
                  "id": "03022506 Vaccines",
                  "label": "Vaccines",
                  "level": 4
                },
                {
                  "code": "03022507",
                  "id": "03022507 Pediatrics/Surgical specialties",
                  "label": "Pediatrics/Surgical specialties",
                  "level": 4
                }
              ]
            },
            {
              "code": "030226",
              "id": "030226 pharmacology & pharmacy",
              "label": "pharmacology & pharmacy",
              "level": 3,
              "children": [
                {
                  "code": "03022601",
                  "id": "03022601 Health care occupations",
                  "label": "Health care occupations",
                  "level": 4
                },
                {
                  "code": "03022602",
                  "id": "03022602 Pharmacokinetics/Life sciences industry",
                  "label": "Pharmacokinetics/Life sciences industry",
                  "level": 4
                },
                {
                  "code": "03022603",
                  "id": "03022603 Routes of administration/Drug delivery devices",
                  "label": "Routes of administration/Drug delivery devices",
                  "level": 4
                }
              ]
            },
            {
              "code": "030227",
              "id": "030227 psychiatry",
              "label": "psychiatry",
              "level": 3,
              "children": [
                {
                  "code": "03022701",
                  "id": "03022701 Mood disorders",
                  "label": "Mood disorders",
                  "level": 4
                }
              ]
            },
            {
              "code": "030228",
              "id": "030228 respiratory system",
              "label": "respiratory system",
              "level": 3,
              "children": [
                {
                  "code": "03022801",
                  "id": "03022801 Sleep disorders/Breathing abnormalities",
                  "label": "Sleep disorders/Breathing abnormalities",
                  "level": 4
                },
                {
                  "code": "03022802",
                  "id": "03022802 Cystic fibrosis/Lung disorders",
                  "label": "Cystic fibrosis/Lung disorders",
                  "level": 4
                },
                {
                  "code": "03022803",
                  "id": "03022803 Lung disorders/Respiratory diseases principally affecting the interstitium",
                  "label": "Lung disorders/Respiratory diseases principally affecting the interstitium",
                  "level": 4
                },
                {
                  "code": "03022804",
                  "id": "03022804 Mechanical ventilation/Respiratory therapy",
                  "label": "Mechanical ventilation/Respiratory therapy",
                  "level": 4
                },
                {
                  "code": "03022805",
                  "id": "03022805 Asthma/Chronic lower respiratory diseases",
                  "label": "Asthma/Chronic lower respiratory diseases",
                  "level": 4
                }
              ]
            },
            {
              "code": "030229",
              "id": "030229 sport sciences",
              "label": "sport sciences",
              "level": 3,
              "children": [
                {
                  "code": "03022901",
                  "id": "03022901 Sports injuries/Overuse injuries",
                  "label": "Sports injuries/Overuse injuries",
                  "level": 4
                },
                {
                  "code": "03022902",
                  "id": "03022902 Environmental social science/Health promotion",
                  "label": "Environmental social science/Health promotion",
                  "level": 4
                },
                {
                  "code": "03022903",
                  "id": "03022903 Physical exercise/Strength training",
                  "label": "Physical exercise/Strength training",
                  "level": 4
                },
                {
                  "code": "03022904",
                  "id": "03022904 Drug discovery/Clinical research",
                  "label": "Drug discovery/Clinical research",
                  "level": 4
                },
                {
                  "code": "03022905",
                  "id": "03022905 Pediatrics/Biostatistics",
                  "label": "Pediatrics/Biostatistics",
                  "level": 4
                }
              ]
            },
            {
              "code": "030230",
              "id": "030230 surgery",
              "label": "surgery",
              "level": 3,
              "children": [
                {
                  "code": "03023002",
                  "id": "03023002 Organ transplantation/Transplantation medicine",
                  "label": "Organ transplantation/Transplantation medicine",
                  "level": 4
                },
                {
                  "code": "03023001",
                  "id": "03023001 Evidence-based practices/Information science",
                  "label": "Evidence-based practices/Information science",
                  "level": 4
                },
                {
                  "code": "03023003",
                  "id": "03023003 Breast surgery/Cosmetic surgery",
                  "label": "Breast surgery/Cosmetic surgery",
                  "level": 4
                }
              ]
            },
            {
              "code": "030231",
              "id": "030231 tropical medicine",
              "label": "tropical medicine",
              "level": 3,
              "children": [
                {
                  "code": "03023101",
                  "id": "03023101 Foodborne illnesses/Helminthiases",
                  "label": "Foodborne illnesses/Helminthiases",
                  "level": 4
                },
                {
                  "code": "03023102",
                  "id": "03023102 Tick-borne diseases/Ticks",
                  "label": "Tick-borne diseases/Ticks",
                  "level": 4
                },
                {
                  "code": "03023103",
                  "id": "03023103 Insect vectors of human pathogens/Malaria",
                  "label": "Insect vectors of human pathogens/Malaria",
                  "level": 4
                },
                {
                  "code": "03023104",
                  "id": "03023104 Diarrhea/Conditions diagnosed by stool test",
                  "label": "Diarrhea/Conditions diagnosed by stool test",
                  "level": 4
                },
                {
                  "code": "03023105",
                  "id": "03023105 Malaria/Plasmodium",
                  "label": "Malaria/Plasmodium",
                  "level": 4
                }
              ]
            },
            {
              "code": "030232",
              "id": "030232 urology & nephrology",
              "label": "urology & nephrology",
              "level": 3,
              "children": [
                {
                  "code": "03023203",
                  "id": "03023203 Kidney diseases/Organ failure",
                  "label": "Kidney diseases/Organ failure",
                  "level": 4
                },
                {
                  "code": "03023204",
                  "id": "03023204 Vascular surgery/Diseases of the aorta",
                  "label": "Vascular surgery/Diseases of the aorta",
                  "level": 4
                },
                {
                  "code": "03023201",
                  "id": "03023201 Organ transplantation/Transplantation medicine",
                  "label": "Organ transplantation/Transplantation medicine",
                  "level": 4
                },
                {
                  "code": "03023202",
                  "id": "03023202 Urinary system/Symptoms and signs: Urinary system",
                  "label": "Urinary system/Symptoms and signs: Urinary system",
                  "level": 4
                },
                {
                  "code": "03023205",
                  "id": "03023205 Sexual dysfunctions/Human sexuality",
                  "label": "Sexual dysfunctions/Human sexuality",
                  "level": 4
                }
              ]
            }
          ]
        },
        {
          "code": "0303",
          "id": "0303 health sciences",
          "label": "health sciences",
          "level": 2,
          "children": [
            {
              "code": "030301",
              "id": "030301 anatomy & morphology",
              "label": "anatomy & morphology",
              "level": 3
            },
            {
              "code": "030302",
              "id": "030302 biochemistry & molecular biology",
              "label": "biochemistry & molecular biology",
              "level": 3,
              "children": [
                {
                  "code": "03030201",
                  "id": "03030201 Transition metals/Cofactors",
                  "label": "Transition metals/Cofactors",
                  "level": 4
                },
                {
                  "code": "03030202",
                  "id": "03030202 Proteins/Proteomics",
                  "label": "Proteins/Proteomics",
                  "level": 4
                },
                {
                  "code": "03030203",
                  "id": "03030203 Finance stubs/Sales taxes",
                  "label": "Finance stubs/Sales taxes",
                  "level": 4
                }
              ]
            },
            {
              "code": "030303",
              "id": "030303 biophysics",
              "label": "biophysics",
              "level": 3,
              "children": [
                {
                  "code": "03030301",
                  "id": "03030301 Simple aromatic rings/Triazoles",
                  "label": "Simple aromatic rings/Triazoles",
                  "level": 4
                }
              ]
            },
            {
              "code": "030304",
              "id": "030304 developmental biology",
              "label": "developmental biology",
              "level": 3
            },
            {
              "code": "030305",
              "id": "030305 genetics & heredity",
              "label": "genetics & heredity",
              "level": 3,
              "children": [
                {
                  "code": "03030501",
                  "id": "03030501 Intellectual disability/Neurodevelopmental disorders",
                  "label": "Intellectual disability/Neurodevelopmental disorders",
                  "level": 4
                }
              ]
            },
            {
              "code": "030306",
              "id": "030306 microbiology",
              "label": "microbiology",
              "level": 3,
              "children": [
                {
                  "code": "03030601",
                  "id": "03030601 Food safety/Foodborne illnesses",
                  "label": "Food safety/Foodborne illnesses",
                  "level": 4
                },
                {
                  "code": "03030602",
                  "id": "03030602 Tuberculosis/Health in Africa",
                  "label": "Tuberculosis/Health in Africa",
                  "level": 4
                },
                {
                  "code": "03030603",
                  "id": "03030603 Fungal diseases/Aspergillus",
                  "label": "Fungal diseases/Aspergillus",
                  "level": 4
                },
                {
                  "code": "03030604",
                  "id": "03030604 Antimicrobial resistance/Evolutionary biology",
                  "label": "Antimicrobial resistance/Evolutionary biology",
                  "level": 4
                },
                {
                  "code": "03030605",
                  "id": "03030605 Health care/Health care quality",
                  "label": "Health care/Health care quality",
                  "level": 4
                },
                {
                  "code": "03030606",
                  "id": "03030606 Bacteriology/Bacteria",
                  "label": "Bacteriology/Bacteria",
                  "level": 4
                }
              ]
            },
            {
              "code": "030307",
              "id": "030307 microscopy",
              "label": "microscopy",
              "level": 3
            },
            {
              "code": "030308",
              "id": "030308 mycology & parasitology",
              "label": "mycology & parasitology",
              "level": 3,
              "children": [
                {
                  "code": "03030801",
                  "id": "03030801 Mycology/Symbiosis",
                  "label": "Mycology/Symbiosis",
                  "level": 4
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                {
                  "code": "03030802",
                  "id": "03030802 Domesticated animals/Livestock",
                  "label": "Domesticated animals/Livestock",
                  "level": 4
                },
                {
                  "code": "03030803",
                  "id": "03030803 Digenea/Disease ecology",
                  "label": "Digenea/Disease ecology",
                  "level": 4
                }
              ]
            },
            {
              "code": "030309",
              "id": "030309 nutrition & dietetics",
              "label": "nutrition & dietetics",
              "level": 3,
              "children": [
                {
                  "code": "03030901",
                  "id": "03030901 Nutrition by type/Dietary supplements",
                  "label": "Nutrition by type/Dietary supplements",
                  "level": 4
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                {
                  "code": "03030902",
                  "id": "03030902 Polyphenols/Nutrition",
                  "label": "Polyphenols/Nutrition",
                  "level": 4
                },
                {
                  "code": "03030903",
                  "id": "03030903 Cooking fats/Margarine brands",
                  "label": "Cooking fats/Margarine brands",
                  "level": 4
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              ]
            },
            {
              "code": "030310",
              "id": "030310 physiology",
              "label": "physiology",
              "level": 3,
              "children": [
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                  "code": "03031001",
                  "id": "03031001 Cardiovascular physiology/Human anatomy by organ",
                  "label": "Cardiovascular physiology/Human anatomy by organ",
                  "level": 4
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              ]
            },
            {
              "code": "030311",
              "id": "030311 toxicology",
              "label": "toxicology",
              "level": 3
            },
            {
              "code": "030312",
              "id": "030312 virology",
              "label": "virology",
              "level": 3
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          ]
        },
        {
          "code": "0304",
          "id": "0304 medical biotechnology",
          "label": "medical biotechnology",
          "level": 2
        },
        {
          "code": "0305",
          "id": "0305 other medical science",
          "label": "other medical science",
          "level": 2,
          "children": [
            {
              "code": "030501",
              "id": "030501 epidemiology",
              "label": "epidemiology",
              "level": 3
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            {
              "code": "030502",
              "id": "030502 gerontology",
              "label": "gerontology",
              "level": 3,
              "children": [
                {
                  "code": "03050201",
                  "id": "03050201 Philosophical movements/Philosophical schools and traditions",
                  "label": "Philosophical movements/Philosophical schools and traditions",
                  "level": 4
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              ]
            },
            {
              "code": "030503",
              "id": "030503 health policy & services",
              "label": "health policy & services",
              "level": 3,
              "children": [
                {
                  "code": "03050301",
                  "id": "03050301 Breast cancer/Antineoplastic drugs",
                  "label": "Breast cancer/Antineoplastic drugs",
                  "level": 4
                }
              ]
            },
            {
              "code": "030504",
              "id": "030504 nursing",
              "label": "nursing",
              "level": 3
            },
            {
              "code": "030505",
              "id": "030505 public health",
              "label": "public health",
              "level": 3,
              "children": [
                {
                  "code": "03050501",
                  "id": "03050501 Sexual health/Epidemiology",
                  "label": "Sexual health/Epidemiology",
                  "level": 4
                },
                {
                  "code": "03050502",
                  "id": "03050502 Health economics/Health policy",
                  "label": "Health economics/Health policy",
                  "level": 4
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              ]
            },
            {
              "code": "030506",
              "id": "030506 rehabilitation",
              "label": "rehabilitation",
              "level": 3,
              "children": [
                {
                  "code": "03050601",
                  "id": "03050601 Occupational therapy/Learning disabilities",
                  "label": "Occupational therapy/Learning disabilities",
                  "level": 4
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              ]
            },
            {
              "code": "030507",
              "id": "030507 speech-language pathology & audiology",
              "label": "speech-language pathology & audiology",
              "level": 3,
              "children": [
                {
                  "code": "03050701",
                  "id": "03050701 Applications of artificial intelligence/Assistive technology",
                  "label": "Applications of artificial intelligence/Assistive technology",
                  "level": 4
                }
              ]
            },
            {
              "code": "030508",
              "id": "030508 substance abuse",
              "label": "substance abuse",
              "level": 3,
              "children": [
                {
                  "code": "03050801",
                  "id": "03050801 Substance-related disorders/Substance dependence",
                  "label": "Substance-related disorders/Substance dependence",
                  "level": 4
                },
                {
                  "code": "03050802",
                  "id": "03050802 Drinking culture/Alcohol abuse",
                  "label": "Drinking culture/Alcohol abuse",
                  "level": 4
                },
                {
                  "code": "03050803",
                  "id": "03050803 Gambling and society/Online gambling",
                  "label": "Gambling and society/Online gambling",
                  "level": 4
                }
              ]
            }
          ]
        }
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    },
    {
      "code": "04",
      "id": "04 agricultural and veterinary sciences",
      "label": "agricultural and veterinary sciences",
      "level": 1,
      "children": [
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          "code": "0401",
          "id": "0401 agriculture, forestry, and fisheries",
          "label": "agriculture, forestry, and fisheries",
          "level": 2,
          "children": [
            {
              "code": "040101",
              "id": "040101 forestry",
              "label": "forestry",
              "level": 3,
              "children": [
                {
                  "code": "04010101",
                  "id": "04010101 Forests/Trees",
                  "label": "Forests/Trees",
                  "level": 4
                },
                {
                  "code": "04010102",
                  "id": "04010102 Governance/Political science terminology",
                  "label": "Governance/Political science terminology",
                  "level": 4
                }
              ]
            },
            {
              "code": "040102",
              "id": "040102 fisheries",
              "label": "fisheries",
              "level": 3,
              "children": [
                {
                  "code": "04010201",
                  "id": "04010201 Aquaculture/Aquaponics",
                  "label": "Aquaculture/Aquaponics",
                  "level": 4
                },
                {
                  "code": "04010202",
                  "id": "04010202 Commercial fish/Fish common names",
                  "label": "Commercial fish/Fish common names",
                  "level": 4
                }
              ]
            },
            {
              "code": "040103",
              "id": "040103 agronomy & agriculture",
              "label": "agronomy & agriculture",
              "level": 3,
              "children": [
                {
                  "code": "04010301",
                  "id": "04010301 Forests/Ecosystems",
                  "label": "Forests/Ecosystems",
                  "level": 4
                },
                {
                  "code": "04010302",
                  "id": "04010302 Weeds/Agricultural pests",
                  "label": "Weeds/Agricultural pests",
                  "level": 4
                },
                {
                  "code": "04010303",
                  "id": "04010303 Agroecology/Sustainable agriculture",
                  "label": "Agroecology/Sustainable agriculture",
                  "level": 4
                },
                {
                  "code": "04010304",
                  "id": "04010304 Horticulture/Soil",
                  "label": "Horticulture/Soil",
                  "level": 4
                }
              ]
            }
          ]
        },
        {
          "code": "0402",
          "id": "0402 animal and dairy science",
          "label": "animal and dairy science",
          "level": 2,
          "children": [
            {
              "code": "040201",
              "id": "040201 dairy & animal science",
              "label": "dairy & animal science",
              "level": 3,
              "children": [
                {
                  "code": "04020101",
                  "id": "04020101 Poultry farming/Chickens",
                  "label": "Poultry farming/Chickens",
                  "level": 4
                },
                {
                  "code": "04020102",
                  "id": "04020102 Meat/Types of food",
                  "label": "Meat/Types of food",
                  "level": 4
                },
                {
                  "code": "04020103",
                  "id": "04020103 Livestock/Animal feed",
                  "label": "Livestock/Animal feed",
                  "level": 4
                },
                {
                  "code": "04020104",
                  "id": "04020104 Dairy farming/Milk",
                  "label": "Dairy farming/Milk",
                  "level": 4
                },
                {
                  "code": "04020105",
                  "id": "04020105 Growth hormones/Human female reproductive system",
                  "label": "Growth hormones/Human female reproductive system",
                  "level": 4
                }
              ]
            }
          ]
        },
        {
          "code": "0403",
          "id": "0403 veterinary science",
          "label": "veterinary science",
          "level": 2,
          "children": [
            {
              "code": "040301",
              "id": "040301 veterinary sciences",
              "label": "veterinary sciences",
              "level": 3,
              "children": [
                {
                  "code": "04030101",
                  "id": "04030101 Horse anatomy/Horse management",
                  "label": "Horse anatomy/Horse management",
                  "level": 4
                },
                {
                  "code": "04030102",
                  "id": "04030102 Animal viral diseases/Swine diseases",
                  "label": "Animal viral diseases/Swine diseases",
                  "level": 4
                },
                {
                  "code": "04030103",
                  "id": "04030103 People in health professions/People working with animals",
                  "label": "People in health professions/People working with animals",
                  "level": 4
                },
                {
                  "code": "04030104",
                  "id": "04030104 Livestock/Dairy farming",
                  "label": "Livestock/Dairy farming",
                  "level": 4
                },
                {
                  "code": "04030105",
                  "id": "04030105 Ticks/Tick-borne diseases",
                  "label": "Ticks/Tick-borne diseases",
                  "level": 4
                },
                {
                  "code": "04030106",
                  "id": "04030106 Behavioural sciences/Cognitive psychology",
                  "label": "Behavioural sciences/Cognitive psychology",
                  "level": 4
                },
                {
                  "code": "04030107",
                  "id": "04030107 Oncology/Dog diseases",
                  "label": "Oncology/Dog diseases",
                  "level": 4
                }
              ]
            }
          ]
        },
        {
          "code": "0404",
          "id": "0404 agricultural biotechnology",
          "label": "agricultural biotechnology",
          "level": 2,
          "children": [
            {
              "code": "040401",
              "id": "040401 food science",
              "label": "food science",
              "level": 3,
              "children": [
                {
                  "code": "04040101",
                  "id": "04040101 Drug delivery devices",
                  "label": "Drug delivery devices",
                  "level": 4
                },
                {
                  "code": "04040102",
                  "id": "04040102 Dairy products/Milk",
                  "label": "Dairy products/Milk",
                  "level": 4
                },
                {
                  "code": "04040103",
                  "id": "04040103 Mycotoxins/Building biology",
                  "label": "Mycotoxins/Building biology",
                  "level": 4
                },
                {
                  "code": "04040104",
                  "id": "04040104 Polyphenols/Phytochemicals",
                  "label": "Polyphenols/Phytochemicals",
                  "level": 4
                },
                {
                  "code": "04040105",
                  "id": "04040105 Food science/Food industry",
                  "label": "Food science/Food industry",
                  "level": 4
                },
                {
                  "code": "04040106",
                  "id": "04040106 Brewing/Fermented drinks",
                  "label": "Brewing/Fermented drinks",
                  "level": 4
                }
              ]
            }
          ]
        },
        {
          "code": "0405",
          "id": "0405 other agricultural sciences",
          "label": "other agricultural sciences",
          "level": 2,
          "children": [
            {
              "code": "040501",
              "id": "040501 horticulture",
              "label": "horticulture",
              "level": 3,
              "children": [
                {
                  "code": "04050101",
                  "id": "04050101 Vegetables/Crops",
                  "label": "Vegetables/Crops",
                  "level": 4
                }
              ]
            },
            {
              "code": "040502",
              "id": "040502 food science",
              "label": "food science",
              "level": 3,
              "children": [
                {
                  "code": "04050201",
                  "id": "04050201 Drug delivery devices",
                  "label": "Drug delivery devices",
                  "level": 4
                },
                {
                  "code": "04050202",
                  "id": "04050202 Dairy products/Milk",
                  "label": "Dairy products/Milk",
                  "level": 4
                },
                {
                  "code": "04050203",
                  "id": "04050203 Mycotoxins/Building biology",
                  "label": "Mycotoxins/Building biology",
                  "level": 4
                },
                {
                  "code": "04050204",
                  "id": "04050204 Polyphenols/Phytochemicals",
                  "label": "Polyphenols/Phytochemicals",
                  "level": 4
                },
                {
                  "code": "04050205",
                  "id": "04050205 Food science/Food industry",
                  "label": "Food science/Food industry",
                  "level": 4
                },
                {
                  "code": "04050206",
                  "id": "04050206 Brewing/Fermented drinks",
                  "label": "Brewing/Fermented drinks",
                  "level": 4
                }
              ]
            }
          ]
        }
      ]
    },
    {
      "code": "05",
      "id": "05 social sciences",
      "label": "social sciences",
      "level": 1,
      "children": [
        {
          "code": "0501",
          "id": "0501 psychology and cognitive sciences",
          "label": "psychology and cognitive sciences",
          "level": 2,
          "children": [
            {
              "code": "050101",
              "id": "050101 languages & linguistics",
              "label": "languages & linguistics",
              "level": 3,
              "children": [
                {
                  "code": "05010101",
                  "id": "05010101 Language education/Language acquisition",
                  "label": "Language education/Language acquisition",
                  "level": 4
                },
                {
                  "code": "05010102",
                  "id": "05010102 Syntax/Generative syntax",
                  "label": "Syntax/Generative syntax",
                  "level": 4
                },
                {
                  "code": "05010103",
                  "id": "05010103 English-language idioms/Sexual selection",
                  "label": "English-language idioms/Sexual selection",
                  "level": 4
                }
              ]
            },
            {
              "code": "050102",
              "id": "050102 behavioral science & comparative psychology",
              "label": "behavioral science & comparative psychology",
              "level": 3,
              "children": [
                {
                  "code": "05010201",
                  "id": "05010201 Cognition/Motivation",
                  "label": "Cognition/Motivation",
                  "level": 4
                },
                {
                  "code": "05010202",
                  "id": "05010202 Welfare economics/Government aid programs",
                  "label": "Welfare economics/Government aid programs",
                  "level": 4
                },
                {
                  "code": "05010203",
                  "id": "05010203 Chimpanzees/IUCN Red List endangered species",
                  "label": "Chimpanzees/IUCN Red List endangered species",
                  "level": 4
                }
              ]
            },
            {
              "code": "050103",
              "id": "050103 clinical psychology",
              "label": "clinical psychology",
              "level": 3,
              "children": [
                {
                  "code": "05010301",
                  "id": "05010301 Criminology/Psychopathy",
                  "label": "Criminology/Psychopathy",
                  "level": 4
                },
                {
                  "code": "05010302",
                  "id": "05010302 Eating disorders/Culture-bound syndromes",
                  "label": "Eating disorders/Culture-bound syndromes",
                  "level": 4
                },
                {
                  "code": "05010303",
                  "id": "05010303 Psychotherapies/Cognitive behavioral therapy",
                  "label": "Psychotherapies/Cognitive behavioral therapy",
                  "level": 4
                },
                {
                  "code": "05010304",
                  "id": "05010304 Behavioral addiction/Sexual dysfunctions",
                  "label": "Behavioral addiction/Sexual dysfunctions",
                  "level": 4
                },
                {
                  "code": "05010305",
                  "id": "05010305 Behaviorism/Behavior modification",
                  "label": "Behaviorism/Behavior modification",
                  "level": 4
                },
                {
                  "code": "05010306",
                  "id": "05010306 Anxiety disorders/Spoken articles",
                  "label": "Anxiety disorders/Spoken articles",
                  "level": 4
                },
                {
                  "code": "05010307",
                  "id": "05010307 Neuropsychology/Neuropsychological assessment",
                  "label": "Neuropsychology/Neuropsychological assessment",
                  "level": 4
                }
              ]
            },
            {
              "code": "050104",
              "id": "050104 developmental & child psychology",
              "label": "developmental & child psychology",
              "level": 3,
              "children": [
                {
                  "code": "05010401",
                  "id": "05010401 Autism spectrum disorders/Learning disabilities",
                  "label": "Autism spectrum disorders/Learning disabilities",
                  "level": 4
                },
                {
                  "code": "05010402",
                  "id": "05010402 Parenting/Childhood",
                  "label": "Parenting/Childhood",
                  "level": 4
                },
                {
                  "code": "05010403",
                  "id": "05010403 Adverse childhood experiences/Crimes",
                  "label": "Adverse childhood experiences/Crimes",
                  "level": 4
                },
                {
                  "code": "05010404",
                  "id": "05010404 Adolescence/Puberty",
                  "label": "Adolescence/Puberty",
                  "level": 4
                }
              ]
            },
            {
              "code": "050105",
              "id": "050105 experimental psychology",
              "label": "experimental psychology",
              "level": 3,
              "children": [
                {
                  "code": "05010501",
                  "id": "05010501 Perception/Sensory systems",
                  "label": "Perception/Sensory systems",
                  "level": 4
                },
                {
                  "code": "05010502",
                  "id": "05010502 Childhood/Developmental psychology",
                  "label": "Childhood/Developmental psychology",
                  "level": 4
                },
                {
                  "code": "05010503",
                  "id": "05010503 Linguistics terminology/Phonetics",
                  "label": "Linguistics terminology/Phonetics",
                  "level": 4
                },
                {
                  "code": "05010504",
                  "id": "05010504 Neurophysiology/Computational neuroscience",
                  "label": "Neurophysiology/Computational neuroscience",
                  "level": 4
                },
                {
                  "code": "05010505",
                  "id": "05010505 Cognition/Neuropsychological assessment",
                  "label": "Cognition/Neuropsychological assessment",
                  "level": 4
                },
                {
                  "code": "05010506",
                  "id": "05010506 Human life stages/Human development",
                  "label": "Human life stages/Human development",
                  "level": 4
                },
                {
                  "code": "05010507",
                  "id": "05010507 Emotion/Affective science",
                  "label": "Emotion/Affective science",
                  "level": 4
                },
                {
                  "code": "05010508",
                  "id": "05010508 Language acquisition/Bilingualism",
                  "label": "Language acquisition/Bilingualism",
                  "level": 4
                },
                {
                  "code": "05010509",
                  "id": "05010509 Complex systems theory/Computational fields of study",
                  "label": "Complex systems theory/Computational fields of study",
                  "level": 4
                }
              ]
            },
            {
              "code": "050106",
              "id": "050106 general psychology & cognitive sciences",
              "label": "general psychology & cognitive sciences",
              "level": 3,
              "children": [
                {
                  "code": "05010601",
                  "id": "05010601 Behavior",
                  "label": "Behavior",
                  "level": 4
                }
              ]
            },
            {
              "code": "050107",
              "id": "050107 human factors",
              "label": "human factors",
              "level": 3,
              "children": [
                {
                  "code": "05010701",
                  "id": "05010701 Ergonomics/Occupational safety and health",
                  "label": "Ergonomics/Occupational safety and health",
                  "level": 4
                },
                {
                  "code": "05010702",
                  "id": "05010702 Automation software/Robotics",
                  "label": "Automation software/Robotics",
                  "level": 4
                },
                {
                  "code": "05010703",
                  "id": "05010703 Human–computer interaction",
                  "label": "Human–computer interaction",
                  "level": 4
                }
              ]
            },
            {
              "code": "050108",
              "id": "050108 psychoanalysis",
              "label": "psychoanalysis",
              "level": 3,
              "children": [
                {
                  "code": "05010801",
                  "id": "05010801 Psychoanalysis/Freudian psychology",
                  "label": "Psychoanalysis/Freudian psychology",
                  "level": 4
                }
              ]
            },
            {
              "code": "050109",
              "id": "050109 social psychology",
              "label": "social psychology",
              "level": 3,
              "children": [
                {
                  "code": "05010901",
                  "id": "05010901 Interpersonal relationships/Sexual fidelity",
                  "label": "Interpersonal relationships/Sexual fidelity",
                  "level": 4
                },
                {
                  "code": "05010902",
                  "id": "05010902 Group processes/Collective identity",
                  "label": "Group processes/Collective identity",
                  "level": 4
                },
                {
                  "code": "05010903",
                  "id": "05010903 Positive psychology/Happiness",
                  "label": "Positive psychology/Happiness",
                  "level": 4
                },
                {
                  "code": "05010904",
                  "id": "05010904 Sexual acts/Interpersonal relationships",
                  "label": "Sexual acts/Interpersonal relationships",
                  "level": 4
                },
                {
                  "code": "05010905",
                  "id": "05010905 Ethical consumerism/Sustainable development",
                  "label": "Ethical consumerism/Sustainable development",
                  "level": 4
                },
                {
                  "code": "05010906",
                  "id": "05010906 Senescence/Old age",
                  "label": "Senescence/Old age",
                  "level": 4
                },
                {
                  "code": "05010907",
                  "id": "05010907 Feminist terminology/Gender roles",
                  "label": "Feminist terminology/Gender roles",
                  "level": 4
                },
                {
                  "code": "05010908",
                  "id": "05010908 Life skills/Behavioural sciences",
                  "label": "Life skills/Behavioural sciences",
                  "level": 4
                },
                {
                  "code": "05010909",
                  "id": "05010909 Culture/Religion",
                  "label": "Culture/Religion",
                  "level": 4
                }
              ]
            }
          ]
        },
        {
          "code": "0502",
          "id": "0502 economics and business",
          "label": "economics and business",
          "level": 2,
          "children": [
            {
              "code": "050201",
              "id": "050201 accounting",
              "label": "accounting",
              "level": 3,
              "children": [
                {
                  "code": "05020101",
                  "id": "05020101 Auditing/Types of auditing",
                  "label": "Auditing/Types of auditing",
                  "level": 4
                },
                {
                  "code": "05020102",
                  "id": "05020102 Social concepts/Accountability",
                  "label": "Social concepts/Accountability",
                  "level": 4
                }
              ]
            },
            {
              "code": "050202",
              "id": "050202 agricultural economics & policy",
              "label": "agricultural economics & policy",
              "level": 3,
              "children": [
                {
                  "code": "05020201",
                  "id": "05020201 Agronomy/Land management",
                  "label": "Agronomy/Land management",
                  "level": 4
                }
              ]
            },
            {
              "code": "050203",
              "id": "050203 business & management",
              "label": "business & management",
              "level": 3,
              "children": [
                {
                  "code": "05020308",
                  "id": "05020308 Supply chain management/Business terms",
                  "label": "Supply chain management/Business terms",
                  "level": 4
                },
                {
                  "code": "05020301",
                  "id": "05020301 Construction/Building engineering",
                  "label": "Construction/Building engineering",
                  "level": 4
                },
                {
                  "code": "05020302",
                  "id": "05020302 Economic bubbles/Financial crises",
                  "label": "Economic bubbles/Financial crises",
                  "level": 4
                },
                {
                  "code": "05020303",
                  "id": "05020303 Innovation/Product management",
                  "label": "Innovation/Product management",
                  "level": 4
                },
                {
                  "code": "05020304",
                  "id": "05020304 Education",
                  "label": "Education",
                  "level": 4
                },
                {
                  "code": "05020305",
                  "id": "05020305 Tourism/Hospitality management",
                  "label": "Tourism/Hospitality management",
                  "level": 4
                },
                {
                  "code": "05020306",
                  "id": "05020306 Corporate governance/Corporate social responsibility",
                  "label": "Corporate governance/Corporate social responsibility",
                  "level": 4
                },
                {
                  "code": "05020307",
                  "id": "05020307 Entrepreneurship/Business occupations",
                  "label": "Entrepreneurship/Business occupations",
                  "level": 4
                },
                {
                  "code": "05020309",
                  "id": "05020309 Leadership/Industrial and organizational psychology",
                  "label": "Leadership/Industrial and organizational psychology",
                  "level": 4
                },
                {
                  "code": "05020310",
                  "id": "05020310 International business/International trade",
                  "label": "International business/International trade",
                  "level": 4
                },
                {
                  "code": "05020311",
                  "id": "05020311 Marketing techniques/Services marketing",
                  "label": "Marketing techniques/Services marketing",
                  "level": 4
                },
                {
                  "code": "05020312",
                  "id": "05020312 Information systems/Innovation",
                  "label": "Information systems/Innovation",
                  "level": 4
                }
              ]
            },
            {
              "code": "050204",
              "id": "050204 development studies",
              "label": "development studies",
              "level": 3,
              "children": [
                {
                  "code": "05020401",
                  "id": "05020401 Rural culture/Welfare economics",
                  "label": "Rural culture/Welfare economics",
                  "level": 4
                }
              ]
            },
            {
              "code": "050205",
              "id": "050205 econometrics",
              "label": "econometrics",
              "level": 3,
              "children": [
                {
                  "code": "05020501",
                  "id": "05020501 Machine learning/Simulation",
                  "label": "Machine learning/Simulation",
                  "level": 4
                }
              ]
            },
            {
              "code": "050206",
              "id": "050206 economic theory",
              "label": "economic theory",
              "level": 3
            },
            {
              "code": "050207",
              "id": "050207 economics",
              "label": "economics",
              "level": 3,
              "children": [
                {
                  "code": "05020701",
                  "id": "05020701 Fiscal policy/Public finance",
                  "label": "Fiscal policy/Public finance",
                  "level": 4
                },
                {
                  "code": "05020702",
                  "id": "05020702 Energy policy",
                  "label": "Energy policy",
                  "level": 4
                },
                {
                  "code": "05020703",
                  "id": "05020703 Economic country classifications/International development",
                  "label": "Economic country classifications/International development",
                  "level": 4
                },
                {
                  "code": "05020704",
                  "id": "05020704 Macroeconomics",
                  "label": "Macroeconomics",
                  "level": 4
                },
                {
                  "code": "05020705",
                  "id": "05020705 Banks/Banking terms",
                  "label": "Banks/Banking terms",
                  "level": 4
                },
                {
                  "code": "05020706",
                  "id": "05020706 Catalysis/Industrial processes",
                  "label": "Catalysis/Industrial processes",
                  "level": 4
                },
                {
                  "code": "05020707",
                  "id": "05020707 Stock market/Financial markets",
                  "label": "Stock market/Financial markets",
                  "level": 4
                },
                {
                  "code": "05020708",
                  "id": "05020708 Car culture/Commuting",
                  "label": "Car culture/Commuting",
                  "level": 4
                }
              ]
            },
            {
              "code": "050208",
              "id": "050208 finance",
              "label": "finance",
              "level": 3,
              "children": [
                {
                  "code": "05020801",
                  "id": "05020801 Auditing/Accounting terminology",
                  "label": "Auditing/Accounting terminology",
                  "level": 4
                },
                {
                  "code": "05020802",
                  "id": "05020802 Corporate finance/Corporate governance",
                  "label": "Corporate finance/Corporate governance",
                  "level": 4
                }
              ]
            },
            {
              "code": "050209",
              "id": "050209 industrial relations",
              "label": "industrial relations",
              "level": 3,
              "children": [
                {
                  "code": "05020901",
                  "id": "05020901 Business cycle",
                  "label": "Business cycle",
                  "level": 4
                }
              ]
            },
            {
              "code": "050210",
              "id": "050210 logistics & transportation",
              "label": "logistics & transportation",
              "level": 3,
              "children": [
                {
                  "code": "05021001",
                  "id": "05021001 Sustainable transport",
                  "label": "Sustainable transport",
                  "level": 4
                },
                {
                  "code": "05021002",
                  "id": "05021002 Emerging technologies/Robotics",
                  "label": "Emerging technologies/Robotics",
                  "level": 4
                },
                {
                  "code": "05021003",
                  "id": "05021003 Regulatory compliance/E-commerce",
                  "label": "Regulatory compliance/E-commerce",
                  "level": 4
                }
              ]
            },
            {
              "code": "050211",
              "id": "050211 marketing",
              "label": "marketing",
              "level": 3,
              "children": [
                {
                  "code": "05021101",
                  "id": "05021101 Halal food/Food law",
                  "label": "Halal food/Food law",
                  "level": 4
                },
                {
                  "code": "05021102",
                  "id": "05021102 Services marketing/Retailing",
                  "label": "Services marketing/Retailing",
                  "level": 4
                },
                {
                  "code": "05021103",
                  "id": "05021103 Brand management/Branding terminology",
                  "label": "Brand management/Branding terminology",
                  "level": 4
                },
                {
                  "code": "05021104",
                  "id": "05021104 Types of tourism/Tourism",
                  "label": "Types of tourism/Tourism",
                  "level": 4
                },
                {
                  "code": "05021105",
                  "id": "05021105 Promotion and marketing communications/Online advertising",
                  "label": "Promotion and marketing communications/Online advertising",
                  "level": 4
                },
                {
                  "code": "05021106",
                  "id": "05021106 Merchandising/Retailing",
                  "label": "Merchandising/Retailing",
                  "level": 4
                },
                {
                  "code": "05021107",
                  "id": "05021107 Organizational behavior/Industrial and organizational psychology",
                  "label": "Organizational behavior/Industrial and organizational psychology",
                  "level": 4
                },
                {
                  "code": "05021108",
                  "id": "05021108 Social networks/Social information processing",
                  "label": "Social networks/Social information processing",
                  "level": 4
                }
              ]
            },
            {
              "code": "050212",
              "id": "050212 sport, leisure & tourism",
              "label": "sport, leisure & tourism",
              "level": 3,
              "children": [
                {
                  "code": "05021202",
                  "id": "05021202 Types of tourism/Tourism",
                  "label": "Types of tourism/Tourism",
                  "level": 4
                },
                {
                  "code": "05021201",
                  "id": "05021201 Social gatherings/Tourism",
                  "label": "Social gatherings/Tourism",
                  "level": 4
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        },
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          "code": "0503",
          "id": "0503 education",
          "label": "education",
          "level": 2,
          "children": [
            {
              "code": "050301",
              "id": "050301 education",
              "label": "education",
              "level": 3,
              "children": [
                {
                  "code": "05030107",
                  "id": "05030107 Leadership/Industrial and organizational psychology",
                  "label": "Leadership/Industrial and organizational psychology",
                  "level": 4
                },
                {
                  "code": "05030101",
                  "id": "05030101 Education and training occupations/Career advice services",
                  "label": "Education and training occupations/Career advice services",
                  "level": 4
                },
                {
                  "code": "05030102",
                  "id": "05030102 Mathematics education/Educational psychology",
                  "label": "Mathematics education/Educational psychology",
                  "level": 4
                },
                {
                  "code": "05030103",
                  "id": "05030103 E-learning/Education and training occupations",
                  "label": "E-learning/Education and training occupations",
                  "level": 4
                },
                {
                  "code": "05030104",
                  "id": "05030104 Gifted education/Educational psychology",
                  "label": "Gifted education/Educational psychology",
                  "level": 4
                },
                {
                  "code": "05030105",
                  "id": "05030105 Special education/Learning disabilities",
                  "label": "Special education/Learning disabilities",
                  "level": 4
                },
                {
                  "code": "05030106",
                  "id": "05030106 Educational technology/Learning",
                  "label": "Educational technology/Learning",
                  "level": 4
                },
                {
                  "code": "05030108",
                  "id": "05030108 Educational stages/Undergraduate education",
                  "label": "Educational stages/Undergraduate education",
                  "level": 4
                },
                {
                  "code": "05030109",
                  "id": "05030109 Educational stages/School types",
                  "label": "Educational stages/School types",
                  "level": 4
                },
                {
                  "code": "05030110",
                  "id": "05030110 Science education/Philosophy of education",
                  "label": "Science education/Philosophy of education",
                  "level": 4
                }
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          ]
        },
        {
          "code": "0504",
          "id": "0504 sociology",
          "label": "sociology",
          "level": 2,
          "children": [
            {
              "code": "050401",
              "id": "050401 social sciences methods",
              "label": "social sciences methods",
              "level": 3,
              "children": [
                {
                  "code": "05040101",
                  "id": "05040101 Quality management/Empirical evidence",
                  "label": "Quality management/Empirical evidence",
                  "level": 4
                },
                {
                  "code": "05040102",
                  "id": "05040102 Psychometrics/Quantitative research",
                  "label": "Psychometrics/Quantitative research",
                  "level": 4
                },
                {
                  "code": "05040103",
                  "id": "05040103 Psychometrics/Quality management",
                  "label": "Psychometrics/Quality management",
                  "level": 4
                }
              ]
            },
            {
              "code": "050402",
              "id": "050402 sociology",
              "label": "sociology",
              "level": 3,
              "children": [
                {
                  "code": "05040201",
                  "id": "05040201 Ethnic and religious slurs/Lists of pejorative terms for people",
                  "label": "Ethnic and religious slurs/Lists of pejorative terms for people",
                  "level": 4
                }
              ]
            }
          ]
        },
        {
          "code": "0505",
          "id": "0505 law",
          "label": "law",
          "level": 2,
          "children": [
            {
              "code": "050501",
              "id": "050501 criminology",
              "label": "criminology",
              "level": 3,
              "children": [
                {
                  "code": "05050101",
                  "id": "05050101 Intimate partner violence/Abuse",
                  "label": "Intimate partner violence/Abuse",
                  "level": 4
                },
                {
                  "code": "05050102",
                  "id": "05050102 Sex crimes/Sexual abuse",
                  "label": "Sex crimes/Sexual abuse",
                  "level": 4
                },
                {
                  "code": "05050103",
                  "id": "05050103 Eyewitness/Memory",
                  "label": "Eyewitness/Memory",
                  "level": 4
                },
                {
                  "code": "05050104",
                  "id": "05050104 Sustainability/Environmental social science concepts",
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}