1. Chairman of Urology Department, Lebanese University & Al Zahraa Hospital, University Medical Center, Beirut, Lebanon.
2. Urology Department, Lebanese University, Beirut, Lebanon.
3. 2nd Department of Urology, School of Medicine, Sismanoglio Hospital, National and Kapodistrian University of Athens, Athens, Greece.
4. Department of Neurosurgery, Lebanese University, Beirut, Lebanon.
5. Division of Urology, Children's National Hospital, Washington, USA.
6. Department of Urology, The George Washington University, Washington, USA.
7. Department of Urology/General Surgery, Areteion Hospital, Athens, Greece.
8. Department of Neurosurgery, Neuroscience Research Center, Faculty of Medical Sciences, Lebanese University, Beirut, Lebanon.