1. Leiden University Medical Centre , Leiden, Netherlands
2. Cliniques Universitaires Saint Luc , Brussels, Belgium
3. University of Pittsburgh Medical Center (UPMC) , Pittsburgh, PA, United States
4. Robert Bosch Hospital , Stuttgart, Germany
5. Na Homolce Hospital , Prague, Czech Republic
6. San Camillo Hospital , Rome, Italy
7. Liverpool Heart and Chest , Liverpool, United Kingdom
8. ISALA Hospital , Zwolle, Netherlands
9. Hospital Clínic de Barcelona , Barcelona, Spain
10. Ziekenhuis Oost Limburg , Genk, Belgium
11. Maastricht University Medical Center , Maastricht, Netherlands
12. University Medical Centre Utrecht , Utrecht, Netherlands
13. OLV Ziekenhuis , Aalst, Belgium
14. Imelda Hospital Bonheiden , Bonheiden, Belgium
15. University Hospital Hradec Kralove , Hradec Kralove, Czech Republic
16. MONZA Hospital , Bucharest, Romania
17. Istanbul Mehmet Akif Ersoy Cardiovascular Surgery Hospital, University of Health Sciences , Istanbul, Turkey
18. Gulhane Education ve Research Hospital , Ankara, Turkey
19. Acibadem Maslak Hospital, Acibadem University , Istanbul, Turkey
20. University Hospital Zurich , Zurich, Switzerland
21. CHU UCL Namur, UC Louvain , Godinne, Belgium
22. CHU Dijon , Dijon, France
23. University Hospital Bordeaux , Bordeaux, France
24. Humanita Gavazzeni , Bergamo, Italy
25. University Hospital Ghent , Ghent, Belgium
26. Erasme Hospital Brussels , Brussels, Belgium
27. Henri MONDOR Hospital, Assistance Publique Hopitaux de Paris , Creteil, France
28. Central Clinical Hospital of the Ministry of the Interior and Administration, Centre of Postgraduate Medical Education , Warsaw, Poland
29. AZ Maria Middelares , Ghent, Belgium
30. Cardiovascular Institute Paris Sud, Private Hospital Jacques Cartier , Massy, France
31. Department of Cardiovascular Sciences, University Hospital Leuven, KU Leuven , Leuven, Belgium