[1] Newcastle Univ, Northern Inst Canc Res, Paul OGorman Bldg,Framlington Pl, Newcastle Upon Tyne NE2 4HH, Tyne & Wear, England
[2] Univ Oslo, Dept Urol, Oslo, Norway
[3] Univ Pisa, Dept Translat Med & New Technol, Pisa, Italy
[4] Univ Giessen, Dept Urol Pediat Urol & Androl, D-35390 Giessen, Germany