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Archived UMLS Information
      UMLS Documentation Archives
      March 2004 UMLS News
      White Paper: UMLS Metathesaurus Rich Release (MR+) Format (August 2003)

Last reviewed: 05 February 2008
Last updated: 09 May 2006
First published: 26 March 2004
Metadata| Permanence level: Permanence Not Guaranteed