1. National Heart, Lung, and Blood Institute’s and Boston University’s Framingham Heart Study (S.R.P., R.B.D., D.L., S.J.R., R.S.V., C.J.O., C.S.F.), Framingham, Massachusetts 01702;
2. Center for Population Studies (S.R.P., D.L., C.J.O., C.S.F.), National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland 20824;
3. Department of Biostatistics (J.M.M.), Boston University School of Public Health;
4. Department of Medicine, and Department of Radiology (U.H.), Massachusetts General Hospital;
5. Department of Mathematics (R.B.D.), Boston University, Boston, Massachusetts 02215;
6. Sections of Preventive Medicine and Cardiology (S.J.R., R.S.V.), Massachusetts General Hospital;
7. General Medicine Division (J.B.M.), Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114;
8. Cardiology Division (C.J.O.), Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts 02114;
9. Division of Endocrinology and Metabolism (C.S.F.), Brigham and Women’s Hospital and Harvard Medical School, Boston, Massachusetts 02115