1. Endemic Medicine and Hepatogastroentrology Department; Faculty of Medicine; Cairo University; Cairo Egypt
2. Tropical Medicine Department; National Hepatology & Tropical Medicine Research Institute; Cairo Egypt
3. Internal Medicine Department; Faculty of Medicine; Mansoura University; Mansora Egypt
4. Internal Medicine Department; Faculty of Medicine; Menia University; Minia Egypt
5. Tropical Medicine Department; Faculty of Medicine; Tanta University; Tanta Egypt
6. Internal Medicine Department; Faculty of Medicine; Cairo University; Cairo Egypt
7. Internal Medicine Department; Faculty of Medicine; Ain Shams University; Cairo Egypt
8. Department of Hepatology; National Liver Institute; Menoufyia University; Menoufyia Egypt
9. Department of Hepatology; Imperial College London; London UK