1. Department of General Surgery, Faculty of Medical Sciences, Lebanese University, Beirut, Lebanon
2. Department of Diagnostic Radiology, University Medical Center, Lebanese Hospital Geitaoui, Beirut, Lebanon
3. Department of Gastroenterology, University Medical Center, Lebanese Hospital Geitaoui, Beirut, Lebanon
4. Department of General Surgery, University Medical Center, Lebanese Hospital Geitaoui, Beirut, Lebanon