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