1. Piedmont Heart Institute Atlanta Georgia
2. Columbia University Medical Center and the Cardiovascular Research Foundation New York New York
3. Mount Sinai Medical Center New York New York
4. The Heart Center of Northeast Georgia Medical Center Gainesville Georgia
5. St. Luke's Mid‐America Heart Institute Kansas City Missouri
6. St. Vincent's Heart Center Indianapolis Indiana
7. PeaceHealth St. Joseph Medical Center, Cardiovascular Center, North Cascade Cardiology Bellingham WA
8. York Hospital York Pennsylvania
9. Beth Israel Deaconess Medical Center Boston Massachusetts
10. Abbott Vascular, Inc. Santa Clara California