1. Faculty of Medicine; Cairo University; Cairo Egypt
2. Faculty of Medicine; Helwan University; Cairo Egypt
3. Faculty of Medicine; Ain Shams University; Cairo Egypt
4. National Liver Institute; Menoufiya University; Shebeen EL Kom Egypt
5. Faculty of Medicine; Zagazig University; Zagazig Egypt
6. Faculty of Medicine; Fayoum University; Fayoum Egypt
7. Faculty of Medicine; Assiut University; Assiut Egypt
8. National Research Center; Cairo Egypt
9. National Committee for Control of Viral Hepatitis; Cairo Egypt
10. National Hepatology and Tropical Medicine Research Institute; Cairo Egypt