API:  http://id.who.int/icd/release/10/2019/Q20-Q28
{
    "@context": "http://id.who.int/icd/contexts/contextForICD10Entity.json",
    "@id": "http://id.who.int/icd/release/10/2019/Q20-Q28",
    "parent": [
        "http://id.who.int/icd/release/10/2019/XVII"
    ],
    "child": [
        "http://id.who.int/icd/release/10/2019/Q20",
        "http://id.who.int/icd/release/10/2019/Q21",
        "http://id.who.int/icd/release/10/2019/Q22",
        "http://id.who.int/icd/release/10/2019/Q23",
        "http://id.who.int/icd/release/10/2019/Q24",
        "http://id.who.int/icd/release/10/2019/Q25",
        "http://id.who.int/icd/release/10/2019/Q26",
        "http://id.who.int/icd/release/10/2019/Q27",
        "http://id.who.int/icd/release/10/2019/Q28"
    ],
    "browserUrl": "http://apps.who.int/classifications/icd10/browse/2019/en#/Q20-Q28",
    "code": "Q20-Q28",
    "title": {
        "@language": "en",
        "@value": "Congenital malformations of the circulatory system"
    },
    "classKind": "block"
}