[1] Cent Hosp Bolzano, Dept Urol, Lorenz Boehler St 5, I-39100 Bolzano, Italy
[2] Cent Hosp Bolzano, Dept Pathol, Bolzano, Italy
[3] Lucerne Canton Hosp, Dept Urol, Luzern, Switzerland
[4] Med Univ Innsbruck, Dept Urol, Innsbruck, Austria
[5] Witten Herdecke Univ, Dept Urol, Helios Klinikum Wuppertal, Wuppertal, Germany
[6] Sigmund Freud Private Univ, Med Sch, Vienna, Austria