Affiliation: | 1. Institute of Internal Medicine and Cardiology, University of Florence, , Florence, Italy;2. Gavazzeni Hospital, , Bergamo, Italy;3. University of Siena, , Siena, Italy;4. Laboratory of Medical Science, Institute of Life Sciences, Scuola Superiore Sant'Anna, , Pisa, Italy;5. Fondazione Toscana “G. Monasterio,” Pisa, , Italy;6. Medtronic Italia, , Rome, Italy |