API:  http://id.who.int/icd/release/10/2010/F11
{
    "@context": "http://id.who.int/icd/contexts/contextForICD10Entity.json",
    "@id": "http://id.who.int/icd/release/10/2010/F11",
    "parent": [
        "http://id.who.int/icd/release/10/2010/F10-F19"
    ],
    "child": [
        "http://id.who.int/icd/release/10/2010/F11.0",
        "http://id.who.int/icd/release/10/2010/F11.1",
        "http://id.who.int/icd/release/10/2010/F11.2",
        "http://id.who.int/icd/release/10/2010/F11.3",
        "http://id.who.int/icd/release/10/2010/F11.4",
        "http://id.who.int/icd/release/10/2010/F11.5",
        "http://id.who.int/icd/release/10/2010/F11.6",
        "http://id.who.int/icd/release/10/2010/F11.7",
        "http://id.who.int/icd/release/10/2010/F11.8",
        "http://id.who.int/icd/release/10/2010/F11.9"
    ],
    "browserUrl": "http://apps.who.int/classifications/icd10/browse/2010/en#/F11",
    "code": "F11",
    "title": {
        "@language": "en",
        "@value": "Mental and behavioural disorders due to use of opioids"
    },
    "classKind": "category"
}