1. Al-Themal Medical Center , Abha , Saudi Arabia
2. Urology Department , , Egypt
3. Menofia University , , Egypt
4. Urology Department , Assuit Branch , Egypt
5. Azhar University , Assuit Branch , Egypt
6. Urology Department, Benha University , , Egypt
7. Urology Department, King Fahad Hospital , Tabuk , Saudi Arabia
8. Division of Urology, Department of Surgery, Faculty of Medicine , Riyadh , Saudi Arabia
9. King Saud University , Riyadh , Saudi Arabia
10. Sexual & Reproductive Medicine , New York City, NY , USA
11. Memorial Sloan Kettering Cancer Center , New York City, NY , USA
12. St. Peters Institute of Andrology , London , UK
13. University College London Hospital , London , UK