1. Urology Unit; Department of Experimental and Clinical Medical Sciences; University of Udine; Udine Italy
2. Urology Unit; Academic Medical Centre Hospital Santa Maria della Misericordia; Udine Italy
3. Department of Urology; University of Catania; Catania Italy
4. Urology Unit; Department of Oncologic, Surgical and Gastrointestinal Sciences; University of Padova; Padova Italy