1. Department of Cardiology, University Hospital of Basel, Petersgraben 4, 4031 Basel, Switzerland
2. University Medical Center, Department of Cardiology and Pneumology, Robert-Koch-Str.40, Göttingen 37075, Germany
3. Rigshospitalet, University of Copenhagen, Copenhagen, RHC, Blegdamsvej 9, Copenhagen OE 2100, Denmark
4. University Medical Center Utrecht, Heidelberglaan 100, Utrecht 3584 CX, The Netherlands
5. Universitäts Herzzentrum Freiburg-Bad Krozingen, Klinik für Kardiologie, Südring 15, 79185 Bad Krozingen, Germany
6. Medizinische Klinik, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81675 München, Germany
7. Semmelweiss University Heart Center, Varosmajor 68, Budapest 1122, Hungary
8. University of Leuven, Herestraat 49, Leuven 3000, Belgium
9. Medical University Lodz, Zeromskiego 113, Lodz 90549, Poland
10. Karolinska Institutet, Department of Cardiology, Solna, Karolinska University Hospital, Solnavägen1, Stockholm 17176, Sweden
11. Slovak Medical University Limbova 12, Bratislava 83303, Slovakia
12. Eberhards Karls Universität Tübingen, Otfried-Müller- Str. 10, 72070 Tübingen, Germany
13. University of Oulu, Institute of Clinical Medicine, Kajaanintie 50, PO Box 5000, Oulu 90014, Finland
14. Attikon University Hospital, Rimini 1, Athens 12462, Greece