1. Cardiology Unit, ‘Card. G. Panico’ Hospital, Via S. Pio X, 4, 73039 Tricase, LE, Italy
2. Division of Cardiology, University of Eastern Piedmont, Maggiore della Carità Hospital, Corso Mazzini, 18, 28100 Novara, Italy
3. Chair of Cardiology, Second University of Naples—Monaldi Hospital, Via Leonardo Bianchi, 80131 Napoli, Italy