1. Cardiology Unit, Ospedale del Cuore, Fondazione Toscana “G. Monasterio”, 54100 Massa, Italy
2. Cardiology Division, Pisa University Hospital, 56124 Pisa, Italy
3. Department of Vascular Surgery, Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, 20122 Milan, Italy
4. Clinical and Community Sciences Department, Università degli Studi di Milano, 20122 Milan, Italy