PubMed is a free search engine for accessing the MEDLINE database of citations, abstracts and some full text articles on life sciences and biomedical topics. The United States National Library of Medicine at the National Institutes of Health maintains PubMed as part of the Entrez information retrieval system. Listing an article or journal in PubMed isn't endorsement. In addition to MEDLINE, PubMed also offers access to OLDMEDLINE for pre-1966 citations. This has recently been enhanced, and reco… (More on Pubmed)