API:  http://id.who.int/icd/release/10/2016/R00-R09
{
    "@context": "http://id.who.int/icd/contexts/contextForICD10Entity.json",
    "@id": "http://id.who.int/icd/release/10/2016/R00-R09",
    "parent": [
        "http://id.who.int/icd/release/10/2016/XVIII"
    ],
    "child": [
        "http://id.who.int/icd/release/10/2016/R00",
        "http://id.who.int/icd/release/10/2016/R01",
        "http://id.who.int/icd/release/10/2016/R02",
        "http://id.who.int/icd/release/10/2016/R03",
        "http://id.who.int/icd/release/10/2016/R04",
        "http://id.who.int/icd/release/10/2016/R05",
        "http://id.who.int/icd/release/10/2016/R06",
        "http://id.who.int/icd/release/10/2016/R07",
        "http://id.who.int/icd/release/10/2016/R09"
    ],
    "browserUrl": "http://apps.who.int/classifications/icd10/browse/2016/en#/R00-R09",
    "code": "R00-R09",
    "title": {
        "@language": "en",
        "@value": "Symptoms and signs involving the circulatory and respiratory systems"
    },
    "classKind": "block"
}