<status value="retired"/> <experimental value="false"/> <date value="2021-11-09T10:00:00+10:00"/> <publisher value="WHO Collaborating Centre for Drug Statistics Methodology"/> <description value="American Type Culture Collection"/> <caseSensitive value="true"/> <content value="not-present"/> </CodeSystem>

This code system http://www.whocc.no/atc defines many codes, but they are not represented here