1. Department of Cardiothoracic Surgery, Onze Lieve Vrouwe Gasthuis, Amsterdam, Netherlands
2. Department of Internal Medicine III (Cardiology and Angiology) UKSH, Campus Kiel, Kiel, Germany
3. Department of Thoracic and Cardiovascular Surgery, Institut Hospitalier Jacques Cartier, Massy, France
4. Department of Cardiac and Vascular Surgery, Medical University of Gdansk, Gdansk, Poland
5. Department of Cardiac Surgery, Medical University Innsbruck, Innsbruck, Austria
6. Department of Cardiothoracic Surgery, Foundation IRCCS Policlinico S. Matteo, Pavia University School of Medicine, Pavia, Italy
7. Department of Cardiovascular Surgery, Hospital Louis Pradel, Lyon, France
8. Division of Cardiology, Helsinki University Central Hospital, Helsinki, Finland
9. Department of Cardiac Surgery, Hospital Jean Minjoz, University Hospital of Besancon, Besancon, France
10. Department of Cardiothoracic Surgery, James Cook Hospital, Middlesbrough, UK
11. Department of Cardiothoracic Surgery, Klinikum Bogenhausen, Munich, Germany
12. Department of Thoracic and Cardiovascular Surgery, West-German Heart Center, University Hospital Essen, Essen, Germany
13. Department of Cardiovascular Surgery, CHU Hospital of Bordeaux, Bordeaux, France
14. Department of Cardiothoracic Surgery, Rikshospital Oslo, Oslo, Norway
15. Department of Cardiovascular Surgery, CHU Rennes, Rennes, France
16. Department of Cardiac Surgery, University of Padova, Padova, Italy
17. Department of Cardiac Surgery, St. Thomas‘Hospital, London, UK
18. Department of Cardiovascular Surgery, Robert-Bosch-Krankenhaus Stuttgart, Stuttgart, Germany
19. Institute for Pharmacology and Preventive Medicine, Cloppenburg, Germany
20. Edwards Lifesciences, Medical Affairs/Professional Education, Nyon, Switzerland