Fayad A, El-Sheikh MG, El-Fayoumy H, El-Sergany R, Abd El Bary A.
Urology Department, Faculty of Medicine, Cairo University, Cairo, Egypt.

Ahmed MH, Ahmed HT, Khalil AA.
Department of Medicine, Wexham Park Hospital, Slough, Berkshire, UK

Kruck S, Anastasiadis AG, Herrmann TR, Walcher U, Abdelhafez MF, Nicklas AP, Hölzle L, Schilling D, Bedke J, Stenzl A, Nagele U.
Department of Urology, University of Tuebingen, Tübingen, Germany.

Zhang LJ.
Department of Urology, University of Texas Southwestern Medical Center, Dallas, USA.

Pirincci N, Gecit I, Bilici S, Taken K, Tanik S, Ceylan K.
Department of Urology, Yüzüncü Yil University, Faculty of Medicine, Van, Turkey.