1Columbia University Medical Center, New York
2New York–Presbyterian Hospital and the Cardiovascular Research Foundation, New York
3Advanced Heart Failure, Vanderbilt Heart and Vascular Institute, Nashville, the Departments of Medicine, Physiology, and Cell Biology, Division of Cardiovascular Medicine
4Davis Heart and Lung Research Institute, Ohio State University, Columbus
5Smidt Heart Institute, Cedars–Sinai Medical Center, Los Angeles
6Division of Cardiology, University of Virginia, Charlottesville
7Kaiser Permanente–San Francisco Hospital, San Francisco
8Intermountain Medical Center, Murray, UT
9Baylor University Medical Center, Baylor Heart and Vascular Institute, Dallas
10Carolinas Medical Center, Charlotte, NC
11Department of Cardiovascular Medicine, Heart and Vascular Institute, Cleveland Clinic, Cleveland
12Piedmont Hospital, Atlanta.
13Christ Hospital, Cincinnati
14University of Colorado Hospital, Aurora
15Saint Luke’s Mid America Heart Institute, University of Missouri–Kansas City School of Medicine, Kansas City
16MedStar Health Research Institute, Hyattsville, MD
17Baylor Scott and White Heart Hospital Plano, Plano