1. Cardiovascular Institute, Azienda Ospedaliero Universitaria di Ferrara, Via Aldo Moro 8, 44124 Cona (FE), Italy
2. Division of Cardiology, AOU Citta` della Salute e della Scienza, University of Turin, Turin (TO), Italy
3. Maria Cecilia Hospital, GVM Care &Research, Cotignola (RA), Italy