1. Minneapolis Heart Institute Foundation Minneapolis Minnesota USA
2. Henry Ford Health System Detroit Michigan USA
3. VA San Diego Health Care System and University of California San Diego La Jolla California USA
4. Baylor Scott & White Heart and Vascular Dallas Texas USA
5. Massachusetts General Hospital Boston Massachusetts USA
6. UC Health Medical Center of the Rockies Loveland Colorado USA
7. Columbia University Irving Medical Center New York New York USA
8. Meshalkin Novosibirsk Research Institute Novosibirsk Russian Federation
9. Minneapolis Heart Institute Abbott Northwestern Hospital Minneapolis Minnesota USA
10. North Oaks Health System, Hammond, LA USA
11. Aswan Heart Centre Magdi Yacoub Foundation Egypt
12. Memorial Bahcelievler Hospital Istanbul Turkey
13. American University of Beirut Medical Center Lebanon
14. VA North Texas Healthcare System and UT Southewestern Medical Center Dallas Texas USA