1. Department of Cardiology, Parma University Hospital , Viale Antonio Gramsci 14, 43126 Parma , Italy
2. Cardiology Unit, San Luca Hospital , Lucca , Italy
3. Division of Cardiology, Villa Salus Hospital Foundation/IRCCS San Camillo Venice , Italy
4. Department of Internal Medicine, Division of Cardiovascular Medicine, University of Nebraska Medical Center, 982265 Nebraska Medical Center , Omaha, NE 68198 , USA
5. Cardiology Division, Department of Biomedical, Metabolic and Neural Sciences, University of Modena and Reggio Emilia, Policlinico Di Modena , Modena , Italy
6. Fatebenefratelli Hospital , Benevento , Italy