1. Weill Cornell Medical College; New York New York
2. University of Colorado School of Medicine; Aurora Colorado
3. The Warren Alpert Medical School of Brown University; Providence Rhode Island
4. Seton Heart Institute; Austin Texas
5. Newton-Wellesley Hospital; Newton Massachusetts
6. Piedmont Heart Institute; Atlanta Georgia
7. Columbia University Medical Center; New York New York
8. UT Health Science Center at San Antonio, Texas
9. Massachusetts General Hospital; Boston Massachusetts
10. University Hospitals Cleveland Medical Center; Cleveland Ohio
11. Duke University Medical Center; Durham North Carolina
12. Ochsner Medical Center; New Orleans Louisiana