API:  http://id.who.int/icd/release/10/2010/M40-M54
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    "@id": "http://id.who.int/icd/release/10/2010/M40-M54",
    "parent": [
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    ],
    "child": [
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    "code": "M40-M54",
    "title": {
        "@language": "en",
        "@value": "Dorsopathies"
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    "classKind": "block"
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