This code system http://terminology.hl7.org/CodeSystem/GMDN defines codes, but no codes are represented here

 <status value="active"/> <experimental value="false"/> <date value="2019-03-20T00:00:00-04:00"/> <publisher value="TBD - External Body"/> <description value="http://www.gmdnagency.com/"/> <caseSensitive value="true"/> <content value="not-present"/> </CodeSystem>