1. Department of Medicine, Division of Cardiology; Emory University School of Medicine; Atlanta Georgia
2. Department of Internal Medicine; Wake Forest School of Medicine; Winston-Salem North Carolina
3. Department of Internal Medicine, Division of Cardiology; Wake Forest School of Medicine; Winston-Salem North Carolina
4. Department of Epidemiology and Prevention, Epidemiological Cardiology Research Center; Wake Forest School of Medicine; Winston-Salem North Carolina