1. Department of Cardiology, DMS in Zabrze, Medical University of Silesia , Katowice , Poland
2. Department of Cardiology, Silesian Center for Heart Diseases , Zabrze , Poland
3. Department of Cardiology and Electrophysiology, Cliniques du Sud Luxembourg—Vivalia , Arlon , Belgium
4. Cardiology Division, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Policlinico di Modena , Modena , Italy
5. Department of Cardiology, Erasme Hospital , Brussels , Belgium
6. Clinic and Policlinic for Cardiology, University Hospital Leipzig , Leipzig , Germany
7. Department of Cardiology II (Electrophysiology), University Hospital Münster , Münster , Germany
8. Department of Invasive Electrophysiology and Cardiac Pacing, Acibadem City Clinic Tokuda Hospital , Sofia , Bulgaria
9. Department of Electrophysiology, Heart Center Leipzig at University of Leipzig , Leipzig , Germany
10. Liverpool Centre for Cardiovascular Science, University of Liverpool and Liverpool Heart and Chest Hospital , Liverpool , UK
11. Department of Clinical Medicine, Aalborg University , Aalborg , Denmark
12. Department of Cardiology, St Antonius Hospital, , Utrecht , The Netherlands
13. Amsterdam University Medical Centers , Amsterdam , The Netherlands
14. Klinika Kardiologie, IKEM , Prague , Czech Republic
15. Faculty of Medicine, Institute of Pharmacology, University Duisburg-Essen , Essen , Germany
16. Faculty of Health and Social Sciences, University of South Bohemia in Ceske Budejovice, Czech Republic and Faculty of Medicine and Dentistry, Palacky University in Olomouc , Czech Republic
17. Department of Medical Science and Cardiology, Uppsala University Hospital , S-751 85 Uppsala , Sweden
18. Department of Cardiology-Electrophysiology, Erasmus Medical Center, Rotterdam , The Netherlands
19. Department of Cardiology, University Heart and Vascular Center , Hamburg , Germany
20. Department of Cardiology, Charité University Medicine , Campus Virchow-Klinikum, 13353 Berlin , Germany
21. Department Of Cardiology, University Medical Center Groningen , Groningen , The Netherlands
22. Department of Arrhythmology, Centro Cardiologico Monzino IRCCS , Milan , Italy
23. Department of Cardiology, Cantonal Hospital , CH-1211 Geneva , Switzerland
24. University Clinic of Munster (Ukm) , Munster , Germany