1. Institute of Cardiology, Department of Medical and Surgical Sciences, University of Bologna, Policlinico S.Orsola-Malpighi , via Massarenti 9 , 40138 Bologna, Italy
2. UOC di Cardiologia, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Dipartimento Cardiotoraco-vascolare , via Massarenti 9, 40138, Bologna , Italy
3. Department of Cardiac, Thoracic, Vascular Sciences and Public Health, University of Padova , Padua , Italy