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Publisher
- United States Public Health Service4
- American Medical Student Association1
- Association of Military Surgeons of the United States1
- Chicago Tribune (Firm)1
- Dartmouth College1
- Florida Times-Union1
- Kiwanis International1
- News and Observer1
- Research! America1
- Richmond Times Dispatch1
- The Baltimore Sun1
- U.S. Medicine1
- University of Pennsylvania. Center for the Study of Aging1
- Washington Post Company1