1. Section of Cardiovascular Research, Department of Medicine, Baylor College of Medicine, Houston, Texas
2. Penn State Heart and Vascular Institute, Pennsylvania State University College of Medicine, Hershey
3. Section of Cardiology, Department of Medicine, Baylor College of Medicine, Houston, Texas
4. Michael E. DeBakey VA Medical Center, Houston, Texas
5. The Russell H. Morgan Department of Radiology and Radiological Sciences, Johns Hopkins University School of Medicine, Baltimore, Maryland
6. The University of Texas Health Science Center School of Public Health, Houston
7. Department of Epidemiology and the Welch Center for Prevention, Epidemiology, and Clinical Research, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
8. Division of Geriatric Medicine, University of Mississippi Medical Center, Jackson
9. Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Johns Hopkins University School of Medicine, Baltimore, Maryland