1. Knight Cardiovascular Institute, Oregon Health & Science University Portland Oregon
2. The Duke Clinical Research Institute Durham North Carolina
3. Division of Cardiology West Virginia University School of Medicine Morgantown West Virginia
4. Division of Cardiology Hurley Medical Center/Michigan State University Flint Michigan
5. Brigham and Women's Hospital Heart & Vascular Center Harvard Medical School Boston Massachusetts
6. Columbia University Medical Center New York‐Presbyterian Hospital New York New York
7. Cardiovascular Research Foundation New York New York