1. Center for Research on Health Care Data Center, Division of General Internal Medicine, University of Pittsburgh, PA (A.D.A.).
2. Vanderbilt Genetics Institute, Vanderbilt University Medical Center, Nashville, TN (J.E.B., N.J.C.).
3. Division of Cardiovascular Medicine, Brigham and Women's Hospital, Boston, MA (B.L.C., R.C.D.).
4. Division of Cardiology, University of Texas Southwestern Medical Center, Dallas (J.A.d.L.).
5. Cardiovascular Division, University of Minnesota Medical School, Minneapolis (S.D.).
6. Department of Cardiovascular Medicine, Heart and Vascular Institute, Cleveland Clinic Foundation, OH (R.H.).
7. Department of Cardiology, Cedars-Sinai Medical Center, and the David Geffen School of Medicine, University of California, Los Angeles (S.K.).
8. Division of Biostatistics, Department of Pharmacology and Experimental Therapeutics, Sidney Kimmel Medical College of Thomas Jefferson University, Philadelphia, PA (S.W.K.).
9. Richard A. and Susan F. Smith Center for Outcomes Research in Cardiology, Division of Cardiology, Department of Medicine, Beth Israel Deaconess Medical Center, Boston, MA (E.S.).
10. School of Public Health, Faculty of Medicine and Health, University of Sydney, Australia (A.T.-P.).
11. Department of Cardiovascular Diseases Medicine, Mayo Clinic College of Medicine, Rochester, MN (V.L.R.)
12. now with Epidemiology and Community Health Branch National Heart, Lung and Blood Institute, National Institutes of Health, Bethesda, MD (V.L.R.).