[1] Sechenov Univ, Inst Urol & Reprod Hlth, Moscow, Russia
[2] Med Univ Vienna, Dept Urol, Vienna, Austria
[3] Univ Hosp Schleswig Holstein, Dept Urol, Lubeck, Germany
[4] Semmelweis Univ, Dept Urol, Budapest, Hungary
[5] Luzerner Kantonsspital, Dept Urol, Luzern, Switzerland