[1] BG Unfallkrankenhaus Berlin, Dept Urol & Neurourol, D-12683 Berlin, Germany
[2] Univ Putra Malaysia UPM, Dept Urol, Serdang 43400, Malaysia
[3] Fdn PTV Policlin Tor Vergata, Urol Unit, I-00133 Rome, Italy
[4] Martin Luther Univ Halle Wittenberg, Univ Hosp Halle, Univ Clin & Polyclin Urol, D-06099 Halle, Germany