1. Department of Urology Lebanese Univeristy Beirut Lebanon
2. Department of Urology, Faculty of Medical Sciences Lebanese University Beirut Lebanon
3. Second Department of Urology, School of Medicine, Sismanoglio Hospital National and Kapodistrian University of Athens Athens Greece
4. Department of Urology and General Surgery Areteion Hospital Athens Greece
5. Department of Neurosurgery, Faculty of Medical Sciences Lebanese University Beirut Lebanon
6. Department of Neurosurgery, Neuroscience Research Center, Faculty of Medical Sciences Lebanese University Beirut Lebanon