1. Epidemiological Cardiology Research Center, Department of Epidemiology and Prevention, Wake Forest School of Medicine, Winston Salem, North Carolina2Section on Cardiology, Department of Internal Medicine, Wake Forest School of Medicine, Winston Salem, Nor
2. Division of Preventive Medicine, University of Alabama at Birmingham
3. Department of Epidemiology, University of Alabama at Birmingham
4. Section on Cardiology, Department of Internal Medicine, Wake Forest School of Medicine, Winston Salem, North Carolina
5. Department of Medicine, University of Vermont, Burlington
6. Department of Biostatistics, University of Alabama at Birmingham