[1] Clin Montevergine, Avellino, Mercogliano, Italy
[2] Ist Clin St Ambrogio, Dept Cardiac Electrophysiol & Pacing, Via Luigi Giuseppe Faravelli 16, I-20149 Milan, Italy
[3] Infermi Hosp, Rivoli, Italy
[4] Boston Sci, Milan, Italy
[5] Azienda Osped Univ Pisana, New Santa Chiara Hosp, Cardiac Thorac Vasc Dept, Div Cardiol 2, Pisa, Italy
[6] Univ Turin, Citta Salute & Sci Torino Hosp, Dept Med Sci, Div Cardiol, Turin, Italy
[7] Cardinal Massaia Hosp, Asti, Italy
[8] Marche Polytech Univ, Cardiol & Arrhythmol Clin, Ancona, Italy
[9] Osped San Giovanni Calibita, Fatebefratelli, Arrhythmol Unit, Rome, Italy
[10] Osped Santa Maria Misericordia, Perugia, Italy
[11] San Filippo Neri Hosp, Div Cardiol, Rome, Italy
[12] Azienda Osped Pugliese Ciaccio, Catanzaro, Italy
[13] Anthea Hosp, Bari, Italy