1. Istituto Clinico Sant’ Ambrogio, Clinical & Research Hospital IRCCS-Gruppo Ospedaliero San Donato, Milano, Italy
2. Austin Health and Royal Melbourne Hospital, Melbourne, Australia
3. Ospedale del Cuore G. Pasquinucci, Fondazione Toscana G. Monasterio, Massa, Italy
4. Centre Hospitalo-Universitaire Brabois ILCV, Nancy, France
5. U.Z. Gasthuisberg, Leuven, Belgium
6. Unniversitat Kilinik, Graz, Austria
7. Ospedale di Mantova, Mantua, Italy
8. Southlake Regional Health Centre, McMaster University, Hamilton, Canada
9. Trillium Cardiovascular Associates, Mississauga, Ontario, Canada
10. Columbia University Medical Center, New York, NY USA
11. University of Montreal, Montreal, Quebec, Canada
12. CHU le Bocage, Dijon, France
13. Freeman Hospital, Newcastle, United Kingdom
14. Klinikum Oldenburg, Oldenburg, Germany
15. Klinikum Nuernberg, Nuremberg, Germany
16. Medizinische Universitaet Innsbruck, Austria
17. Ospedale Ferrarotto, Catania, Italy
18. Blackpool Victoria Hospital, Blackpool, United Kingdom
19. Cliniques Universitaires St-Luc, Brussels, Belgium
20. Hospital University Germans Trias I Pujol, Barcelona, Spain
21. Medizinischen Hochschule Hannover, Hannover, Germany
22. Mayo Clinic, Rochester, MN USA
23. FondazionePoliambulanza, Brescia, Italy
24. University Medical Center Ljubljana, Ljubljana, Slovenia.