1. National Heart, Blood and Lung Institute's Framingham Heart Study, Framingham, MA
2. Deutsches Herzzentrum, Munich, Germany
3. Department of Mathematics and Statistics, Boston University, Boston, MA
4. Department of Biostatistics, Boston University School of Public Health, Boston, MA
5. Evans Department of Medicine, Boston University School of Medicine, Boston, MA
6. Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA
7. Division of Cardiovascular Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA
8. Veterans Administration Hospital, West Roxbury, MA
9. Harvard Medical School, Boston, MA
10. Sections of Preventive Medicine and Epidemiology and Cardiology, Department of Medicine, Boston University School of Medicine, Boston, MA
11. Cardiovascular Engineering, Inc, Norwood, MA