API:  http://id.who.int/icd/release/10/2019/I20
{
    "@context": "http://id.who.int/icd/contexts/contextForICD10Entity.json",
    "@id": "http://id.who.int/icd/release/10/2019/I20",
    "parent": [
        "http://id.who.int/icd/release/10/2019/I20-I25"
    ],
    "child": [
        "http://id.who.int/icd/release/10/2019/I20.0",
        "http://id.who.int/icd/release/10/2019/I20.1",
        "http://id.who.int/icd/release/10/2019/I20.8",
        "http://id.who.int/icd/release/10/2019/I20.9"
    ],
    "browserUrl": "http://apps.who.int/classifications/icd10/browse/2019/en#/I20",
    "code": "I20",
    "title": {
        "@language": "en",
        "@value": "Angina pectoris"
    },
    "classKind": "category"
}