Alberto Martini1, Giorgio Gandaglia2, Giulio Nicita3, Francesco Montorsi2. 1. Department of Urology, University Vita Salute, San Raffaele Hospital, Milan, Italy. Electronic address: a.martini.md@gmail.com. 2. Department of Urology, University Vita Salute, San Raffaele Hospital, Milan, Italy. 3. Department of Urology, University of Florence, Florence, Italy.