1. Endemic Medicine Department, Faculty of Medicine Helwan University Cairo Egypt
2. Department of Internal Medicine Al‐Azhar University Cairo Egypt
3. Department of Endemic Medicine and Hepatology, Faculty of Medicine Cairo University Cairo Egypt
4. Tropical Medicine Department Ain shams university Cairo Egypt
5. Gastroenterology & Hepatology Department Police Authority Hospital Cairo Egypt
6. New Cairo Viral Hepatitis Treatment Unit New Cairo Hospital Cairo Egypt
7. Hepatology and Gastroenterology and Infectious Diseases National Hepatology and Tropical Medicine Research Institute (NHTMRI) Cairo Egypt
8. Internal Medicine Department, Faculty of Medicine Ain Shams University Cairo Egypt