1. Arrhythmia Unit, Cardiology Department, Vall d’Hebron University Hospital , Pg. de la Vall d'Hebron 119, 08035 Barcelona , Spain
2. Cardiology-Heart Rhythm Management Department, Clinique Pasteur , 45 Avenue de Lombez - BP 27617 - 31076, 31300 Toulouse , France
3. Royal Brompton & Harefield Hospitals, Guy’s & St Thomas (NHS Foundation Trust) , Sydney st., London SW3 6NP , UK
4. Arrhythmia Unit, Department of Cardiothoracovascular Medicine, Careggi University Hospital , Largo Giovanni Alessandro Brambilla, 3, 50134 Florence , Italy
5. Division of Cardiology, Department of Medicine, Medical University of Graz , Auenbruggerpl. 2, 8036 Graz , Austria
6. Department of Cardiology, Arrhythmia Clinic, Algemeen Stedelijk Ziekenhuis Aalst , Merestraat 80, 9300 Aalst , Belgium
7. Arrhythmia Unit, Fondazione Toscana Gabriele Monasterio , via Moruzzi 1, 56124 Pisa , Italy
8. Cardiology Department, ‘Victor Babes’ University of Medicine and Pharmacy , 2 Eftimie Murgu 2, Timisoara 300041 , Romania
9. Cardiology Department, European Georges Pompidou Hospital , 20 Rue Leblanc, 75015 Paris , France
10. Department of Cardiology, Dubrava University Hospital , Avenija Gojka Šuška 6, 10000 Zagreb , Croatia
11. II Department of Heart Arrhythmia, National Institute of Cardiology , Alpejska 42, 04-628 Warsaw , Poland
12. Department of Cardiology, Hospital de la Santa Creu i Sant Pau, Sant Quintí , 89, 08025 Barcelona , Spain
13. Universidad Autonoma de Barcelona, Plaça Cívica , 08193 Bellaterra, Barcelona , Spain
14. Cardiovascular Disease Networking Biomedical Research Center (CIBERCV) , Spain
15. Heart Institute, Teknon Medical Center , Vilana nº 12, 08022 Barcelona , Spain
16. Cardioangiologisches Centrum Bethanien (CCB), Medizinische Klinik III, Agaplesion Markus Krankenhaus , Im Prüfling 23, 60389 Frankfurt am Main , Germany