[1] Markus Krankenhaus, Frankfurt, Germany
[2] Natl Ctr Tumor Dis, Heidelberg, Germany
[3] Johannes Gutenberg Univ Mainz, Dept Urol & Pediat Urol, Mainz, Germany
[4] Univ Regensburg, Dept Urol, Caritas St Josef Med Ctr, Regensburg, Germany
[5] Univ Med Mainz, Mainz, Germany