1. Gastroenterology and Endoscopy Department, Armed Forces Hospital Southern Region, Khamis Mushayt, Saudi Arabia
2. Clinical Oncology, Faculty of Medicine, Ain-Shams University, Egypt
3. Oncology Department, Armed Forces Hospital Southern Region, Khamis Mushayt, Saudi Arabia
4. Radiology Department, Armed Forces Hospital Southern Region, Khamis Mushayt, Saudi Arabia
5. Pathology Department, Armed Forces Hospital Southern Region, Khamis Mushayt, Saudi Arabia
6. Preventive Medicine Department, Armed Forces Hospital Southern Region, Khamis Mushayt, Saudi Arabia