1. General Surgery Department, Zagazig University, Zagazig, Egypt
2. General Surgery Department, Al-Ahrar Teaching Hospital, Zagazig, Egypt
3. Radiology Department, Al-Shefa Specialized Hospital, Najran City, Saudi Arabia
4. Radiology Department, Zagazig University, Zagazig, Egypt
5. Internal Medicine Department, Al-Shefa Specialized Hospital, Najran City, Saudi Arabia
6. Anesthesia Department, Al-Shefa Specialized Hospital, Najran City, Saudi Arabia
7. Anaesthesia Department, Al-Azhar University, Cairo, Egypt