API:  http://id.who.int/icd/release/10/2010/H46-H48
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    "@id": "http://id.who.int/icd/release/10/2010/H46-H48",
    "parent": [
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    "child": [
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    "browserUrl": "http://apps.who.int/classifications/icd10/browse/2010/en#/H46-H48",
    "code": "H46-H48",
    "title": {
        "@language": "en",
        "@value": "Disorders of optic nerve and visual pathways"
    },
    "classKind": "block"
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