1. Department of Surgery , Prince Mohammed Bin Abdulaziz Hospital, , Riyadh , Saudi Arabia
2. Ministry of Health , Prince Mohammed Bin Abdulaziz Hospital, , Riyadh , Saudi Arabia
3. College of Medicine, Princess Nourah Bint Abdulrahman University , Riyadh , Saudi Arabia
4. General Surgery Department , Faculty of Medicine, , Benha , Egypt
5. Benha University , Faculty of Medicine, , Benha , Egypt
6. Department of Surgery , College of Medicine, , Abha , Saudi Arabia
7. King Khalid University , College of Medicine, , Abha , Saudi Arabia
8. Department of Pathology, Prince Mohammed Bin Abdulaziz Hospital, Ministry of Health , Riyadh , Saudi Arabia