MEDLINE is the premier bibliographic database covering the fields of
medicine, nursing, dentistry, veterinary medicine, the health care
system, and the preclinical sciences. MEDLINE contains bibliographic
citations and author abstracts from more than 4,800 biomedical
journals published in the United States and 70 other countries. The
database contains over 12 million citations dating back to the
mid-1960's. Coverage is worldwide, but most records are from
English-language sources or have English abstracts.