API:  http://id.who.int/icd/release/10/2019/Q90
{
    "@context": "http://id.who.int/icd/contexts/contextForICD10Entity.json",
    "@id": "http://id.who.int/icd/release/10/2019/Q90",
    "parent": [
        "http://id.who.int/icd/release/10/2019/Q90-Q99"
    ],
    "child": [
        "http://id.who.int/icd/release/10/2019/Q90.0",
        "http://id.who.int/icd/release/10/2019/Q90.1",
        "http://id.who.int/icd/release/10/2019/Q90.2",
        "http://id.who.int/icd/release/10/2019/Q90.9"
    ],
    "browserUrl": "http://apps.who.int/classifications/icd10/browse/2019/en#/Q90",
    "code": "Q90",
    "title": {
        "@language": "en",
        "@value": "Down syndrome"
    },
    "classKind": "category"
}