[1] Univ Turin, San Luigi Gonzaga Hosp, Sch Med, Dept Oncol,Div Urol, Reg Gonzole 10, I-10043 Orbassano, Italy
[2] Regina Margher Hosp, Div Pediat Urol, I-10126 Turin, Italy
[3] Univ Turin, Dept Med Sci, Via Verdi 8, I-10124 Turin, Italy
[4] FPO IRCCS, Candiolo Canc Inst, Dept Surg, I-10060 Candiolo, Italy
[5] Children & Mother Hosp, Dept Pediat Urol, F-69500 Lyon, France