1. Section on Cardiology, Department of Internal Medicine; School of Medicine, Wake Forest University; Winston-Salem North Carolina
2. Department of Epidemiology and Biostatistics; College of Public Health University of South Florida; Tampa Florida
3. Division of Cardiology, Department of Medicine; Duke University Medical Center; Durham North Carolina
4. Departments of Gerontology; School of Medicine Wake Forest University; Winston-Salem North Carolina
5. Department of Public Health Sciences; School of Medicine Wake Forest University; Winston-Salem North Carolina