1. Health Policy, Quality and Informatics Program, Michael E. DeBakey VA Medical Center Health Services Research and Development Center for Innovations in Quality, Effectiveness, and Safety, Houston, Texas
2. Section of Health Services Research, Department of Medicine, Baylor College of Medicine, Houston, Texas
3. Section of Cardiology, Department of Medicine, Baylor College of Medicine, Houston, Texas
4. Section of Cardiology, Michael E. DeBakey Veterans Affairs Medical Center, Houston, Texas
5. Methodist DeBakey Heart and Vascular Center, Houston Methodist Hospital, Houston, Texas
6. Department of Medicine, The Aga Khan University, Karachi, Pakistan
7. Department of Medicine, Cardiology Division, Hoag Memorial Hospital, University of California at Irvine
8. Department of Medicine, West Virginia University, Morgantown
9. Division of Cardiovascular Medicine, University of Florida, Gainesville
10. Department of Veterans Affairs Medical Center, Gainesville, Florida
11. Section of Cardiovascular Research, Department of Medicine, Baylor College of Medicine, Houston, Texas