1. Andrology Unit, University Hospital S. Orsola-Malpighi, Bologna, Italy
2. Departments of Urology, University of Trieste, Hospital of Cattinara, Trieste, Italy
3. Department of Urology, University of Bologna, Bologna, Italy
4. Department of Urology, University of Turin, Hospital Molinette, Turin, Italy
5. Department of Urology, Abano Terme Hospital, Abano Terme, Padua, Italy
6. Sapienza University of Rome, Rome, Italy