1. Minneapolis Heart Institute and Minneapolis Heart Institute Foundation Abbott Northwestern Hospital Minneapolis Minnesota USA
2. Henry Ford Cardiovascular Division Detroit Minnesota USA
3. Meshalkin Novosibirsk Research Institute Novosibirsk Russia
4. Gagnon Cardiovascular Institute Morristown Medical Center Morristown New Jersey USA
5. Massachusetts General Hospital Boston Massachusetts USA
6. Cleveland Clinic Cleveland Ohio USA
7. University Hospitals Case Western Reserve University Cleveland Ohio USA
8. UCSD Medical Center La Jolla California USA
9. Red Cross Hospital of Athens Athens Greece
10. Biruni University Medical School Istanbul Turkey
11. St. Boniface General Hospital Winnipeg Manitoba Canada
12. Emory University Hospital Midtown Atlanta Georgia USA
13. North Oaks Health System Hammond Louisiana USA
14. Memorial Bahcelievler Hospital Istanbul Turkey
15. Aswan Heart Center Magdi Yacoub Foundation Cairo Egypt