PubMed Database for medical research, a service of the National Library of Medicine. Contains bibliographic citations and author abstracts from 3,900 biomedical journals published in the U.S. and 70 foreign countries. The database includes over 19 million citations. PubMed covers international literature on biomedicine, including the allied health fields, biological and physical sciences, humanities, and information science related to medicine. Coverage from the 1950s to date.