1. Columbia University Division of Cardiology, Mount Sinai Medical Center, Miami Beach, Florida
2. Columbia University Medical Center/New York Presbyterian Hospital, New York
3. Emory University, Atlanta, Georgia
4. Cardiovascular Research Foundation, New York, New York
5. Bluhm Cardiovascular Institute, Northwestern University, Chicago, Illinois
6. Baylor Scott & White Health, Plano, Texas
7. Cleveland Clinic, Cleveland, Ohio