1. Section of Cardiac Electrophysiology, Division of Cardiology, Department of Medicine, University of California, San Francisco
2. Institute of Human Genetics and Department of Medicine, University of California, San Francisco
3. Department of Epidemiology, University of Washington, Seattle
4. Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis
5. Department of Epidemiology and Biostatistics, University of California, San Francisco
6. Department of Epidemiology and Prevention, Public Health Sciences, Wake Forest School of Medicine, Winston-Salem, North Carolina
7. Department of Epidemiology, University of Washington, Seattle7Cardiovascular Health Research Unit, University of Washington, Seattle8Departments of Medicine and Health Services, University of Washington, Seattle9Group Health Research Institute, Group Heal
8. Section of Cardiovascular Medicine, Department of Medicine, Boston University School of Medicine, Boston, Massachusetts
9. Department of Medicine, University of California, San Francisco 12Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco
10. McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland
11. Department of Medicine, University of California, San Francisco
12. Laboratory of Epidemiology, Demography, and Biometry, Intramural Research Program, National Institute on Aging, US National Institutes of Health, Bethesda, Maryland
13. Division of Cardiovascular Medicine, Stanford University School of Medicine, Stanford, California