API:  http://id.who.int/icd/release/10/2016/O31
{
    "@context": "http://id.who.int/icd/contexts/contextForICD10Entity.json",
    "@id": "http://id.who.int/icd/release/10/2016/O31",
    "parent": [
        "http://id.who.int/icd/release/10/2016/O30-O48"
    ],
    "child": [
        "http://id.who.int/icd/release/10/2016/O31.0",
        "http://id.who.int/icd/release/10/2016/O31.1",
        "http://id.who.int/icd/release/10/2016/O31.2",
        "http://id.who.int/icd/release/10/2016/O31.8"
    ],
    "browserUrl": "http://apps.who.int/classifications/icd10/browse/2016/en#/O31",
    "code": "O31",
    "title": {
        "@language": "en",
        "@value": "Complications specific to multiple gestation"
    },
    "exclusion": [
        {
            "label": {
                "@language": "en",
                "@value": "conjoined twins causing disproportion"
            }
        },
        {
            "label": {
                "@language": "en",
                "@value": "delayed delivery of second twin, triplet, etc."
            }
        },
        {
            "label": {
                "@language": "en",
                "@value": "malpresentation of one fetus or more"
            }
        },
        {
            "label": {
                "@language": "en",
                "@value": "with obstructed labour"
            }
        }
    ],
    "classKind": "category"
}