API:  http://id.who.int/icd/release/10/2008/F90-F98
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    "@id": "http://id.who.int/icd/release/10/2008/F90-F98",
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    "child": [
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        "http://id.who.int/icd/release/10/2008/F91",
        "http://id.who.int/icd/release/10/2008/F92",
        "http://id.who.int/icd/release/10/2008/F93",
        "http://id.who.int/icd/release/10/2008/F94",
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    "code": "F90-F98",
    "title": {
        "@language": "en",
        "@value": "Behavioural and emotional disorders with onset usually occurring in childhood and adolescence"
    },
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