[1] Klinikum Rechts Der Isar, Dept Urol, Munich, Germany
[2] Univ Ulm, Biometry, Ulm, Germany
[3] Tech Univ, Urol, Munich, Germany
[4] Tech Univ, Psychoso, Munich, Germany
[5] Univ Dusseldorf, Urol, Dusseldorf, Germany
[6] Heidelberg Univ, Urol, Heidelberg, Germany
[7] Hannover Med Sch, Urol, Hannover, Germany