PubMed This link opens in a new windowProvides a search engine and index to citations and abstracts for life sciences and biomedical literature from the National Library of Medicine's MEDLINE database. Other databases available include the National Center for Biotechnology Information (NCBI) Bookshelf, the Medical Subject Headings (MeSH) thesaurus of terminology, and numerous nucleic acid and protein sequence libraries. Citations may include links to full-text content from PubMed Central (public access) and external databases to which CWRU subscribes.