1. Department of Surgery, College of Medicine, University of Hail, Hail, Saudi Arabia
2. Department of Surgery, College of Medicine, Jazan University, Jazan, Saudi Arabia
3. Department of Surgery, College of Medicine, University of Tabuk, Tabuk, Saudi Arabia
4. Department of Surgery, College of Medicine, Majmaah University, Majmaah, Saudi Arabia
5. Department of Surgery, King Abdulaziz Hospital, Makkah, Saudi Arabia
6. Department of Surgery, Alhada Military Hospital, Taif, Saudi Arabia
7. Department of Surgery, College of Medicine, Alzaeim Alazhari University, Khartoum, Sudan