1. Department of Electrophysiology and PacingOnassis Cardiac Surgery Center Athens Greece
2. Department of Cardiology, Cardiovascular Research Institute Maastricht (CARIM)Maastricht University Medical Center+ Maastricht The Netherlands
3. Faculty of MedicineJosip Juraj Strossmayer University of Osijek Croatia
4. Cardiology DepartmentSt Helens and Knowsley Teaching Hospitals NHS Trust, Whiston Hospital Prescot UK
5. Department of Cardiology and Angiology, Klinikum LüdenscheidWitten/Herdecke University Germany
6. Department of Cardiology“Carol Davila” University of Medicine and Pharmacy Bucharest Romania
7. Department of CardiologyProf C. C. Iliescu Institute of Cardiovascular Diseases Bucharest Romania
8. Department of CardiologyHospital Santa Cruz Lisbon Portugal
9. Department of Cardiology II‐ElectrophysiologyUniversity Hospital of Muenster Muenster Germany
10. Department of Cardiovascular Disease“Sestre Milosrdnice” University Hospital Centre Zagreb Croatia
11. Division of Cardiology, Department of MedicineMedical University of Graz Austria
12. Department of Cardiology, Clinical Academic GroupSt. George's University Hospitals NHS Foundation Trust UK
13. Department of Cardiology and AngiologyUniversitätsklinikum Essen, Westdeutsches Herz und Gefäßzentrum Essen Germany
14. Department of CardiologyZNA Middelheim Antwerp Belgium
15. Department of Cardiac ElectrophysiologyNational Institute of Cardiovascular Diseases Karachi Pakistan