1. Department of Epidemiology, Emory University Rollins School of Public Health, Atlanta, Georgia
2. Division of Cardiology, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia
3. Department of Pediatrics, Georgia Prevention Institute, Augusta University, Augusta, Georgia
4. Vietnam Era Twin Registry, Seattle Epidemiologic Research and Information Center, US Department of Veterans Affairs, Seattle, Washington
5. Department of Epidemiology, University of Washington School of Public Health, Seattle, Washington
6. Division of Cardiology, Department of Medicine, Yale University School of Medicine, New Haven, Connecticut
7. Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, Georgia
8. Atlanta Veterans Affairs Medical Center, Atlanta, Georgia