1. Heart Hospital Baylor Plano, Baylor Healthcare System, Plano, Texas
2. Duke Clinical Research Institute, Durham, North Carolina
3. University of California, San Francisco
4. University of Colorado, Denver
5. University of Florida, Jacksonville
6. Massachusetts General Hospital, Boston
7. Cleveland Clinic, Cleveland, Ohio
8. American College of Cardiology, Washington, DC
9. Society of Thoracic Surgeons, Chicago, Illinois
10. Mayo Clinic, Rochester, Minnesota