<status value="active"/> <date value="2014-03-26T00:00:00-04:00"/> <description value="Information was sought but not found (e.g., patient was asked but didn't know)"/> <compose> <include> <system value="http://terminology.hl7.org/CodeSystem/v3-NullFlavor"/> <filter> <property value="concept"/> <op value="is-a"/> <value value="ASKU"/> </filter> </include> </compose> </ValueSet>

AskedButUnknown

Information was sought but not found (e.g., patient was asked but didn't know)