1. Research Triangle Institute (D.J.B.), Rockville, Rockville, Maryland 20852
2. Department of Medicine (A.M.M.), University of Washington School of Medicine, and Geriatric Research, Education and Clinical Center, Veterans Affairs Puget Sound Health Care System, Seattle, Washington 98108
3. New England Research Institutes (A.B.A., J.B.M.), Watertown, Massachusetts 02472