1. Division of Endocrinology and Metabolism (A.C.W.), San Francisco, California 94143
2. San Francisco Coordinating Center (S.H.), California Pacific Medical Center Research Institute, San Francisco, California 94120
3. Department of Medicine, Division of Endocrinology, Diabetes, and Clinical Nutrition (M.H.S., E.O.), Oregon Health and Science University, Portland, Oregon 97239
4. Department of Medicine and Division of Epidemiology and Community Health (K.E.E.), Minneapolis, Minnesota 55455
5. Center for Health Research (E.S.L), Kaiser Permanente Northwest, Portland, Oregon 97232
6. Department of Medicine (A.R.H.), Stanford University School of Medicine, Stanford, California 94305
7. Geriatric Research Education and Clinical Center (H.A.F.), University of Minnesota and Veterans Affairs Medical Center, Minneapolis, Minnesota 55455
8. Division of Epidemiology, Department of Family and Preventive Medicine (E.B.-C.), University of California, San Diego, California 93092
9. Departments of Medicine, Epidemiology, and Biostatistics (D.C.B.), University of California, San Francisco, California 94143