API:  http://id.who.int/icd/release/10/2008/Y51
{
    "@context": "http://id.who.int/icd/contexts/contextForICD10Entity.json",
    "@id": "http://id.who.int/icd/release/10/2008/Y51",
    "parent": [
        "http://id.who.int/icd/release/10/2008/Y40-Y59"
    ],
    "child": [
        "http://id.who.int/icd/release/10/2008/Y51.0",
        "http://id.who.int/icd/release/10/2008/Y51.1",
        "http://id.who.int/icd/release/10/2008/Y51.2",
        "http://id.who.int/icd/release/10/2008/Y51.3",
        "http://id.who.int/icd/release/10/2008/Y51.4",
        "http://id.who.int/icd/release/10/2008/Y51.5",
        "http://id.who.int/icd/release/10/2008/Y51.6",
        "http://id.who.int/icd/release/10/2008/Y51.7",
        "http://id.who.int/icd/release/10/2008/Y51.8",
        "http://id.who.int/icd/release/10/2008/Y51.9"
    ],
    "browserUrl": "http://apps.who.int/classifications/icd10/browse/2008/en#/Y51",
    "code": "Y51",
    "title": {
        "@language": "en",
        "@value": "Drugs primarily affecting the autonomic nervous system"
    },
    "classKind": "category"
}