1. Department of Medicine, Gastroenterology Unit, King Fahad Hospital, Jeddah, Saudi Arabia
2. Hepatology Section, Hepatobiliary Sciences and Organs Transplant Center, King Abdulaziz Medical City, Riyadh, Saudi Arabia
3. King Abdullah International Medical Research Center, Riyadh, Saudi Arabia
4. King Saud Bin Abdulaziz University for Health Sciences, Ministry of National Guard Health Affairs, Riyadh, Saudi Arabia
5. General Directorate of Communicable Diseases, Ministry of Health, Riyadh, Saudi Arabia
6. Liver Disease Research Center, and Riyadh, Saudi Arabia
7. College of Medicine, King Saud University, Riyadh, Saudi Arabia
8. Department of Medicine, Division of Gastroenterology, King Fahd Military Complex, Dhahran, Saudi Arabia
9. Department of Gastroenterology and Hepatology, King Fahad Medical City, Riyadh, Saudi Arabia
10. Department of Medicine, Section of Gastroenterology, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
11. College of Medicine, Al Faisal University, Riyadh, Saudi Arabia
12. Gastroenterology Section, Department of Medicine, King Abdulaziz Medical City, Jeddah, Saudi Arabia