API:  http://id.who.int/icd/release/10/2019/M40-M43
{
    "@context": "http://id.who.int/icd/contexts/contextForICD10Entity.json",
    "@id": "http://id.who.int/icd/release/10/2019/M40-M43",
    "parent": [
        "http://id.who.int/icd/release/10/2019/M40-M54"
    ],
    "child": [
        "http://id.who.int/icd/release/10/2019/M40",
        "http://id.who.int/icd/release/10/2019/M41",
        "http://id.who.int/icd/release/10/2019/M42",
        "http://id.who.int/icd/release/10/2019/M43"
    ],
    "browserUrl": "http://apps.who.int/classifications/icd10/browse/2019/en#/M40-M43",
    "code": "M40-M43",
    "title": {
        "@language": "en",
        "@value": "Deforming dorsopathies"
    },
    "classKind": "block"
}