1. Gastroenterology Unit; Department of Medicine; College of Medicine; King Saud University; Riyadh Saudi Arabia
2. Liver Disease Research Center; King Saud University; Riyadh Saudi Arabia
3. Tropical Medicine & Gastroenterology Department; Assiut University Hospital; Assiut Egypt
4. Department of Radiology and Medical Imaging; College of Medicine; King Saud University; Riyadh Saudi Arabia
5. Diagnostic Radiology; Salman Bin Abdulaziz University; Alkharj Saudi Arabia
6. Security Forces Hospital; Riyadh Saudi Arabia
7. King Saud Bin Abdulaziz University for Health Sciences; College of Medicine; Riyadh Saudi Arabia