1. Urology Department, Farwaniya Hospital, Kuwait
2. Menoufia University-Egypt, Shebin Elkom, Egypt
3. Urology Department, Kuwait University, Kuwait
4. Urology Department, Mansoura Urology and Nephrology Center, Egypt
5. Urology Department, Menoufia University, Gamal Abdelnaser Street, Shebin Elkom 325100, Egypt