1. Hackensack University Medical Center, Structural and Congenital Heart Center, Hackensack, New Jersey
2. Columbia University Medical Center and Cardiovascular Research Foundation, New York, New York
3. Hôpital Européen Georges Pompidou, Paris, France
4. State University of New York Downstate Medical Center and College of Medicine, New York, New York
5. Baim Institute for Clinical Research, Boston, Massachusetts
6. Cedars Sinai Medical Center, Los Angeles, California
7. Padua University Hospital, Padua, Italy
8. Montreal Heart Institute, Montreal, Quebec, Canada
9. NYU Langone Medical Center, New York, New York
10. Lenox Hill Heart and Vascular Institute-North Shore LIJ Health System, New York, New York
11. St. Paul's Hospital, University of British Columbia, Vancouver, British Columbia, Canada
12. University Hospital Zurich, Zurch, Switzerland
13. Hospital Santa Creu i Sant Pau, Barcelona, Spain
14. AP-HP Hôpital Bichat Service de Cardiologie, Paris, France
15. Brigham & Women's Hospital, Boston, Massachusetts
16. Québec Heart & Lung Institute, Quebec City, Quebec, Canada
17. Ochsner Clinic, New Orleans, Louisiana
18. Mayo Clinic, Rochester, Minnesota
19. Minneapolis Heart Institute and Abbott Northwestern Hospital, Minneapolis, Minnesota
20. Clevelend Clinic, Cleveland, Ohio
21. Mount Sinai School of Medicine, New York, New York
22. Rutgers Robert Wood Johnson Medical School, New Brunswick, New Jersey
23. MedStar Health Research Institute, Washington, DC
24. Hospital Clínico San Carlos, Madrid, Spain
25. Imperial College London, London, United Kingdom