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doi: 10.1097/01.ACM.0000291783.44940.9d
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In 2000, with funding from the National Institutes of Health, researchers at Oregon Health and Science University School of Medicine discovered that low doses of the hormone melatonin can shift the human “body clock” (circadian rhythms) to an earlier time when taken in the afternoon and to a later time when taken in the morning.

For other important milestones in medical knowledge and practice credited to academic medical centers, visit the “Discoveries and Innovations in Patient Care and Research Database” at (

© 2007 Association of American Medical Colleges