1. Division of Cardiology, Department of Medicine, Emory University School of Medicine, Atlanta, GA
2. Department of Epidemiology, University of Florida School of Public Health, Gainesville, FL
3. Department of Radiology, Emory University School of Medicine, Atlanta, GA
4. Atlanta Veterans Administration Medical Center, Decatur, GA
5. Department of Psychiatry, Emory University School of Medicine, Atlanta, GA
6. Department of Epidemiology, Emory University Rollins School of Public Health, Atlanta, GA