1. American Center for Reproductive Medicine; Cleveland Clinic; Cleveland OH USA
2. Department of Physiology; University of Health Sciences; Lahore Pakistan
3. College of Medicine; Prince Sattam Bin Abdulaziz University; Al Kharj KSA Saudi Arabia
4. ANDROFERT; Andrology and Human Reproduction Clinic; Campinas SP Brazil
5. Department of Urology; Cleveland Clinic; Cleveland OH USA