{
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  "contained" : [
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      "manufacturer": "Health Connect Medical Devices Inc",
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        "system": "http://snomed.info/sct",
        "code": "25267002",
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    "text": "Insertion of intracardiac pacemaker"
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  "category": {
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      {
        "system": "http://snomed.info/sct",
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  "subject": {
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  "performedDateTime": "2020-01-23",
  "recorder": {
    "reference": "Practitioner/b-practitioner-1",
    "display": "Dr Maria Hernandez"
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      "manipulated" : {
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        "reference": "#b-device-contained"
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    }
  ]
}