       </div>
 	  <div class="form-group">
         <label for="Recorder">Recorded By</label>
-        <input id="Recorder" class="form-control" type="text" disabled value="{{resource.resourceJson.asserter.display}}">
+        <input id="Recorder" class="form-control" type="text" disabled value="{{resource.resourceJson.asserter?.display}}">
       </div>
     </div>
     <div class="col-md-6">

        <label for="Date">Date</label>
        <input id="Date" class="form-control" type="text" disabled value="{{resource.resourceJson.period.start | date:''dd/MM/y''}}">
      </div>
      <div class="form-group">
        <label for="Practitioner">Practitioner</label>
        <input id="Practitioner" class="form-control" type="text" disabled value="{{resource.resourceJson.participant[0].individual.display}}">
      </div>

		</div>
		<div class="form-group">
			<label for="Source">Source</label>
			<input id="Source" class="form-control" type="text" disabled value="{{resource.resourceJson.informationSource?.display}}">
		</div>
    </div>
  </div>
