Department of Surgery, American University of Beirut Medical Center, Riad El-Solh, Beirut, Lebanon. Office of Medical Affairs, Gulf Pharmaceutical Industries - Julphar, United Arab Emirates, Beirut-Lebanon Offices, Beirut, Lebanon. Faculty of Health Sciences, American University of Beirut, Beirut, Lebanon. Gulf Pharmaceutical Industries - Julphar, United Arab Emirates, Beirut-Lebanon Offices, Beirut, Lebanon. Department of Surgery, American University of Beirut Medical Center, Riad El-Solh, Beirut, Lebanon. es25@aub.edu.lb.