1. Endocrine Unit (J.S.F, R.M.N.), Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts 02114
2. Channing Laboratory (M.-L.T.L.), Brigham and Women’s Hospital, Boston, Massachusetts 02115
3. Department of Epidemiology (M.F.S.), University of Michigan, Ann Arbor, Michigan 48109
4. Division of Research (B.E.), Kaiser Permanente Medical Care Program, Oakland, California 94611
5. Department of Health Research and Policy (J.L.K.), School of Medicine, Stanford University School of Medicine, Stanford, California 94305
6. Department of Epidemiology (J.A.C.), Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania 15213
7. Division of Geriatrics (G.A.G., M.-H.H.), University of California Los Angeles School of Medicine, Los Angeles, California 90095