1. Department of Cardiovascular Sciences, Policlinico Casilino of Rome , Via Casilina, 1049, 00169 Rome , Italy
2. Department of Cardiology, Cardiovascular Research Institute Maastricht (CARIM), Maastricht University Medical Center , P. Debyelaan 25, 6229 HX Maastricht , The Netherlands
3. Department of Cardiology, Cardiocenter, Third Faculty of Medicine, Charles University, University Hospital Kralovske Vinohrady , Ruská 2411, 100 00 Prague 10-Vinohrady, Czech Republic
4. Arrhythmia and Electrophysiology Unit, Department of Cardiology, Santa Maria della Misericordia General Hospital , Viale Tre Martiri, 140, 45100 Rovigo , Italy
5. Unidad de Arritmias, Departamento de Cardiología, Hospital Universitario Quirón-Salud Madrid and Complejo Hospitalario Ruber Juan Bravo, Universidad Europea de Madrid , Calle de Juan Bravo, 49, 28006 Madrid , Spain