1. Department of Pathology, King Saud University, Riyadh, Saudi Arabia
2. Department of Surgery, King Saud University, Riyadh, Saudi Arabia
3. College of Medicine Research Center, Deanship of Scientific Research, King Saud University, Riyadh, Saudi Arabia
4. Department of Surgery, King Faisal Specialist Hospital and Research center, Riyadh, Saudi Arabia
5. Department of Surgery, National Guard Health Affairs, Riyadh, Saudi Arabia
6. Department of Surgery, Prince Sultan Military Medical City, Riyadh, Saudi Arabia