1. National Heart, Lung, and Blood Institute's Division of Intramural Research, The Framingham Heart Study, and the Population Studies Branch, Framingham, MA
2. Department of Radiology, Massachusetts General Hospital, Boston, MA
3. Department of Biostatistics, Boston University, Boston, MA
4. Division of Cardiovascular Medicine, University of Massachusetts Medical School, Worcester, MA
5. Evans Department of Medicine, Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA
6. Sections of Cardiology and Preventive Medicine, Boston University School of Medicine, Boston, MA
7. Department of Epidemiology, Boston University School of Public Health, Boston, MA
8. Division of Endocrinology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA