[1] Univ British Columbia, Stone Ctr Vancouver Gen Hosp, Dept Urol Sci, Vancouver, BC, Canada
[2] Ruhr Univ Bochum, Marien Hosp Herne, Dept Urol, Herne, Germany
[3] Univ British Columbia, Vacnouver Prostate Ctr, Dept Urol Sci, Vancouver, BC, Canada
[4] King Saud Bin Abdulaziz Univ Hlth Sci, Coll Appl Med Sci, Jeddah, Saudi Arabia
[5] King Abdullah Int Med Res Ctr, Jeddah, Saudi Arabia
[6] Tech Univ Dresden, Univ Hosp Carl Gustav Carus, Dept Urol, Dresden, Germany