1. Division of Cardiology, Department of Medicine, Cedars-Sinai Research Institute, Cedars-Sinai Medical Center, Los Angeles, California.
2. Department of Medicine, University of California School of Medicine, Los Angeles, California.
3. Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, Pennsylvania.
4. Division of Cardiology, Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania.
5. Division of Cardiology, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama.
6. Division of Cardiology, Department of Medicine, University of Florida, Gainesville, Florida.
7. Rhode Island Hospital, Providence, Rhode Island.
8. Division of Cardiovascular Diseases, National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, Maryland.