urrent problem list is done by checking
    with the Condition resource is referenced from the correct list.
  </p>
  <p>
    On the RESTful API, this is done using the <a href="search.html#current">list search mechanism</a>:
  </p>
  <pre>
 GET [base]/AllergyIntolerance?patient=42&amp;_list=$current-allergies
</pre>
  <p>
    This is a request to fetch all the allergies in the patient 42's "Current Allergy List".
    Note that the server is not required to actually make a resource representation