1. Department of Cardiovascular and Thoracic Sciences, Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
2. Division of Cardiology, University of Florida College of Medicine, Jacksonville, Florida, United States
3. Division of Cardiology, C.A.S.T., P.O. “G. Rodolico,” Azienda Ospedaliero Universitaria “Policlinico-Vittorio Emanuele”, University of Catania, Catania, Italy