1. Cardiology Unit, Department of Medical and Surgical Specialties, Radiological Sciences and Public Health University, Cardiothoracic Department, Spedali Civili of Brescia, Piazzale Spedali Civili 1, 25123, Brescia, Italy
2. Department of Medical Biotechnologies, Division of Cardiology, University of Siena, Viale M. Bracci, 16, 53100 Siena, Italy