1. Minneapolis Heart Institute and Minneapolis Heart Institute Foundation, Abbott Northwestern Hospital Minneapolis Minnesota USA
2. Texas Health Presbyterian Hospital Dallas Texas USA
3. University Hospitals Case Western Reserve University Cleveland Ohio USA
4. Cleveland Clinic Cleveland Ohio USA
5. WellSpan York Hospital York Pennsylvania USA
6. Massachusetts General Hospital Boston Massachusetts USA
7. Oklahoma Heart Institute Tulsa Oklahoma USA
8. Department of Medicine Division of Cardiology University of Washington Seattle Washington USA
9. Henry Ford Cardiovascular Division Detroit Michigan USA
10. Tristar Centennial Medical Center Nashville Tennessee USA
11. St. Vincent Hospital Indianapolis Indiana USA
12. North Oaks Health System Hammond Louisiana USA
13. Aswan Heart Center, Magdi Yacoub Foundation Cairo Egypt
14. Memorial Bahcelievler Hospital Istanbul Turkey
15. Biruni University Medical School Istanbul Turkey