1 Cardiology Unit, Cardiac Thoracic and Vascular Department, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Italy.
2 Department of Medical and Surgical Sciences (DIMEC), IRCCS Policlinico St. Orsola-Malpighi, Alma Mater Studiorum University of Bologna, Via Giuseppe Massarenti 9, 40138 Bologna, Italy.