el-Assmy A, Abou-el-Ghar ME, el-Nahas AR, Refaie HF, Sheir KZ
Urology Department, Urology and Nephrology Center, Mansoura University, Mansoura, Egypt

Kumar S, Kumar S, Ganesamoni R, Mandal AK, Prasad S, Singh SK
Department of Urology, Post Graduate Institute of Medical Education and Research, Chandigarh, India

Romics I, Siller G, Kohnen R, Mavrogenis S, Varga J, Holman E
Department of Urology, Semmelweis University, Budapest, Hungary

Li Y, Chen Y, Huang G, Ru X, Li W, Zhang W, Huang X
Center Laboratory, the People's Hospital in Gansu Province, Lanzhou, China

Rebuck DA, Coleman S, Chen JF, Casey JT, Perry KT, Nadler RB
Department of Urology, Northwestern University Feinberg School of Medicine , Chicago, Illinois