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MedlinePlus is the National Institutes of Health's web site for information about diseases, conditions, and wellness issues. There are directories, a medical encyclopedia and a medical dictionary, easy-to-understand tutorials on common conditions, tests, and treatments, health information in Spanish, extensive information on prescription and nonprescription drugs, health information from the media, and links to thousands of clinical trials. Updated daily. Produced by the National Library of Medicine (NLM).
National Library of Medicine (U.S.)
National Library of Medicine (U.S.) and the National Institutes of Health