1. Division of Urology, Department of Surgery, Virginia Commonwealth University, Richmond, Virginia
2. Department of Urology, Magna Graecia University of Catanzaro, Catanzaro, Italy
3. Department of Medical, Oral and Biotechnological Sciences, G. d'Annunzio University of Chieti, Urology Unit, SS Annunziata Hospital, Chieti, Italy
4. Laboratory of Biostatistics, Department of Medical, Oral and Biotechnological Sciences, G. d'Annunzio University of Chieti, Chieti, Italy
5. Urology Clinic, Department of Surgery, Oncology and Gastroenterology, University of Padua, Padua, Italy
6. Department of Urology, Andrology and Kidney Transplantation Unit, University of Bari, Bari, Italy
7. Department of Urology, European Institute of Oncology, Milan, Italy
8. Department of Urology, University of Catania, Catania, Italy
9. Division of Urology, Department of Oncology, University of Turin, San Luigi Hospital, Orbassano, Turin, Italy