| Affiliation: | 1. Boston University and the National Heart, Lung, and Blood Institute''s Framingham Heart Study, Framingham, MA;2. Section of Cardiovascular Medicine, Department of Medicine, Boston University, Boston, MA;3. Center for Population Studies of the National Heart, Lung, and Blood Institute, Bethesda, MD;4. Sections of Cardiology and Preventive Medicine and Epidemiology, Department of Medicine, Boston University School of Medicine, Boston, MA;5. Cardiovascular Research Center and Cardiac Arrhythmia Service, Massachusetts General Hospital, Boston, MA;6. Division of Cardiovascular Medicine, Department of Medicine, University of Massachusetts Medical School, Worcester, MA;g Department of Mathematics and Statistics, Boston University, Boston, MA |
