1. Framingham Heart Study, Massachusetts
2. Section of General Internal Medicine, Department of Medicine, Boston University School of Medicine, Massachusetts
3. Department of Biostatistics, Boston University School of Public Health, Massachusetts
4. Section of Computational Biomedicine, Department of Medicine, Boston University School of Medicine, Massachusetts
5. Department of Medicine, Section of Cardiovascular Medicine and Preventive Medicine, Boston University School of Medicine, Massachusetts
6. Department of Epidemiology, Boston University School of Public Health, Massachusetts
7. The Population Sciences Branch, Division of Intramural Research, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland