PubMed Subject Subset Strategies Updated for 2013. NLM Tech Bull. 2013 Jan-Feb;(390):b1.
PubMed subject subset strategies are reviewed each year to determine if modifications are necessary. Modifications may include revisions due to changes in Medical Subject Heading (MeSH) vocabulary or MEDLINE journals, adding or deleting terms, and changing parts of a strategy to optimize retrieval. The following subset strategies were recently revised: