Affiliation: | 1. Cardiology Unit, S. Maria Annunziata Hospital, , Florence, Italy;2. Epidemiology Unit, Local Health Unit, , Florence, Italy;3. Department of Cardiology, Careggi Hospital, , Florence, Italy;4. Department of Cardiovascular Sciences, Division of Cardiology, European Hospital, , Rome, Italy;5. Division of Cardiology, Northwestern University Feinberg School of Medicine, , Chicago, Illinois, USA;6. Department of Cardiology, Local Health Unit, , Florence, Italy |