[1] Univ Klinikum Frankfurt, Klin Urol, Theodor Stern Kai 7, D-60590 Frankfurt, Germany
[2] Charite Univ Med Berlin, Klin Urol, Berlin, Germany
[3] Univ Klinikum Ulm, Klin Strahlentherapie & Radioonkol, Ulm, Germany
[4] Klinikum Braunschweig, Klin Urol & Uroonkol, Braunschweig, Germany
[5] Univ Klinikum Hamburg Eppendorf, Prostatakrebszentrum, Martini Klin, Hamburg, Germany