1. Department of Medicine, College of Medicine, King Khalid University, Abha, Riyadh, Saudi Arabia
2. Department of Medicine, Gastroenterology Division, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
3. Department of Gastroenterology and Hepatology, King Saud Medical City, Riyadh, Saudi Arabia
4. Liver and Small Bowel Health Center, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
5. Department of Medicine, Division of Gastroenterology, College of Medicine, King Saud University, Riyadh, Saudi Arabia
6. Gastroenterology Department, King Saud Hospital, Qassim, Saudi Arabia
7. Department of Medicine, College of Medicine, Qassim University, Qassim, Saudi Arabia
8. Gastroenterology Section, Department of Medicine, King Abdulaziz Medical City, Jeddah, Saudi Arabia
9. Department of Medicine, Division of Gastroenterology, College of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
10. Gastrointestinal Oncology Unit, King Abdulaziz University Hospital, Jeddah, Saudi Arabia
11. Department of Gastroenterology and Hepatology, King Fahad Medical City, Riyadh, Saudi Arabia