1. Department of Cardiology, Institute of Sport Medicine and Science , Largo Piero Gabrielli 1, 00197 Rome , Italy
2. Department of Cardiology , Policlinico Casilino Via Casilina 1049, 00169 Roma , Italy
3. Department of Public Health and Infectious Disease, University Sapienza , Piazzale Aldo Moro, 5, 00185 Roma , Italy
4. Department of Cardiac, Thoracic and Vascular Science and Public Health, University of Padua , Via Giustiniani, 2 - 35128 Padova , Italy