<status value="retired"/> <experimental value="false"/> <date value="2021-11-09T10:00:00+10:00"/> <publisher value="TBD - External Body"/> <description value="National Drug Data File Plus Source Vocabulary 2004. San Bruno, CA: First DataBank, March 11, 2004. This entry was generated to support the Sources in the UMLS. Additional metadata is still missing."/> <caseSensitive value="true"/> <content value="not-present"/> </CodeSystem>

This code system http://terminology.hl7.org/CodeSystem/nddf defines many codes, but they are not represented here