[1] Rudolfstiftung Hosp, Dept Urol, Vienna, Austria
[2] Region Hosp, Dept Urol, Ceske Budejovice, Czech Republic
[3] Charles Univ Prague, Fac Med 1, Dept Urol, Prague, Czech Republic
[4] Dr Lutfi Kirdar Kartal Res & Training Hosp, Dept Urol, Istanbul, Turkey
[5] Med Univ, Dept Urol, Vienna, Austria
[6] Sismanoglio Hosp, Athens Med Sch, Dept Urol 2, Athens, Greece
[7] Tech Univ Munich, Dept Urol, D-80290 Munich, Germany
[8] Univ Tubingen, Sindelfingen Boblingen Med Ctr, Dept Urol, Sindelfingen, Germany