[1] San Carlo di Nancy Hosp, Urol Dept, Rome, Italy
[2] Univ Brescia, Spedali Civili Hosp, Urol Unit, Brescia, Italy
[3] Univ Brescia, Data Methods & Syst Stat Lab, Brescia, Italy
[4] Univ G dAnnunzio, Urol Unit, DAnnunzio Hosp, Chieti, Italy
[5] Univ Florence, Urol Unit, Careggi Hosp, Florence, Italy