Clinical assessment tool example - GCS with individual scores as related QuestionnaireAnswer

{
  "resourceType" : "Observation",
  "id" : "gcs-qa",
  "status" : "final",
  "code" : {
    "coding" : [{
      "system" : "http://loinc.org",
      "code" : "9269-2",
      "display" : "Glasgow coma score total"
    }],
    "text" : "Glasgow Coma Scale , (GCS)"
  },
  "subject" : {
    "reference" : "Patient/example",
    "display" : "Peter James Chalmers"
  },
  "effectiveDateTime" : "2014-12-11T04:44:16Z",
  "valueQuantity" : {
    "value" : 13,
    "system" : "http://unitsofmeasure.org",
    "code" : "{score}"
  },
  "referenceRange" : [{
    "high" : {
      "value" : 8,
      "system" : "http://unitsofmeasure.org",
      "code" : "{score}"
    },
    "type" : {
      "text" : "Severe TBI"
    }
  },
  {
    "low" : {
      "value" : 9,
      "system" : "http://unitsofmeasure.org",
      "code" : "{score}"
    },
    "high" : {
      "value" : 12,
      "system" : "http://unitsofmeasure.org",
      "code" : "{score}"
    },
    "type" : {
      "text" : "Moderate TBI"
    }
  },
  {
    "low" : {
      "value" : 13,
      "system" : "http://unitsofmeasure.org",
      "code" : "{score}"
    },
    "type" : {
      "text" : "Mild TBI"
    }
  }],
  "derivedFrom" : [{
    "reference" : "QuestionnaireResponse/gcs",
    "display" : "GCS form results"
  }]
}