1. Intermountain Medical Center, Salt Lake City, Utah
2. Cleveland Clinic, Cleveland, Ohio
3. Mayo Clinic Hospital, Rochester, Minnesota
4. Columbia University, New York, New York
5. University of Washington Medical Center, Seattle
6. Saint Thomas Hospital, Nashville, Tennessee
7. Memorial Hermann Heart and Vascular Institute, University of Texas/McGovern Medical School, Houston
8. Heart Hospital Baylor Plano, Plano, Texas
9. Henry Ford Hospital, Detroit, Michigan
10. Cedar Sinai Medical Center, Los Angeles, California