MeSH XML Release: Changes in Release File Data for 2014 MeSH. NLM Tech Bull. 2013 Jan-Feb;(390):b3.
Starting in the fall of 2013, the MeSH XML releases will no longer include the Unified Medical Language System (UMLS) Concept Unique Identifiers (CUIs). Because MeSH concepts and their identifiers (MUIs) are incorporated into the UMLS, the most up-to-date MUI-CUI concept mappings can be found in the UMLS Metathesaurus. For more information on obtaining UMLS data see: http://www.nlm.nih.gov/research/umls/.