1950 - Present
MEDLINE is the National Library of Medicine's online database that contains 12 million references to journal articles in the health sciences. Coverage of basic research and the clinical sciences is broad, and includes medicine, nursing, dentistry, veterinary medicine, the health care system, and the preclinical sciences. Information in the database comes from 3,900 journals in 40 different languages. More than half of these journals are published in the United States, and almost 90% of the current references are to articles in English.