1. Division of Cardiology, Duke University Medical Center, Durham, North Carolina2Duke Clinical Research Institute, Durham, North Carolina
2. Department of Cardiovascular Electrophysiology, Brigham and Women’s Hospital, Boston, Massachusetts
3. Duke Clinical Research Institute, Durham, North Carolina
4. Ahmanson Cardiomyopathy Center, Ronald Reagan UCLA Medical Center, Los Angeles, California
5. Division of Cardiology, University of Texas Southwestern Medical Center, Dallas