1. Department of Internal Medicine, Division of Cardiology, University of Texas Southwestern Medical Center, Dallas (J.A.J., M.L., M.D.).
2. Division of Cardiology, Department of Medicine, Vagelos College of Physicians and Surgeons, Columbia University, New York, NY (E.Y.W.).
3. Department of Cardiovascular Medicine, Heart and Vascular Institute, Cleveland Clinic, OH (M.K.C.).
4. Department of Cardiovascular Medicine, Icahn School of Medicine at Mount Sinai, New York, NY (M.K.T.).
5. Department of Medicine, University of Minnesota, Minneapolis (A.G.).
6. Department of Cardiovascular and Thoracic Surgery, University of Louisville, KY (M.S.S., B.P.B.).
7. Heart Centre, The Alfred Hospital, Melbourne, Australia (P.M.K.).
8. Department of Internal Medicine, University of Washington, Seattle (B.S., J.E.P.).
9. Kansas City Heart Rhythm Institute and Research Foundation, Overland Park, KS (G.M., D.L., R.G.).
10. Department of Internal Medicine, Cardiovascular Division, Washington University School of Medicine, St. Louis, MO (J.V.).
11. Advanced Heart Failure/Transplantation Program, Division of Cardiovascular Medicine, Department of Internal Medicine, Perelman School of Medicine, Philadelphia, PA (E.Y.B.).
12. Advanced Heart Disease and Transplant, Division of Cardiology, University of Wisconsin, Madison (R.D.).