API:  http://id.who.int/icd/release/10/2019/P01
{
    "@context": "http://id.who.int/icd/contexts/contextForICD10Entity.json",
    "@id": "http://id.who.int/icd/release/10/2019/P01",
    "parent": [
        "http://id.who.int/icd/release/10/2019/P00-P04"
    ],
    "child": [
        "http://id.who.int/icd/release/10/2019/P01.0",
        "http://id.who.int/icd/release/10/2019/P01.1",
        "http://id.who.int/icd/release/10/2019/P01.2",
        "http://id.who.int/icd/release/10/2019/P01.3",
        "http://id.who.int/icd/release/10/2019/P01.4",
        "http://id.who.int/icd/release/10/2019/P01.5",
        "http://id.who.int/icd/release/10/2019/P01.6",
        "http://id.who.int/icd/release/10/2019/P01.7",
        "http://id.who.int/icd/release/10/2019/P01.8",
        "http://id.who.int/icd/release/10/2019/P01.9"
    ],
    "browserUrl": "http://apps.who.int/classifications/icd10/browse/2019/en#/P01",
    "code": "P01",
    "title": {
        "@language": "en",
        "@value": "Fetus and newborn affected by maternal complications of pregnancy"
    },
    "classKind": "category"
}