1. Endemic Medicine and Hepatology; Faculty of Medicine; Cairo University; Cairo Egypt
2. Pediatrics (Hematology/Oncology); Ain Shams University; Cairo Egypt
3. Endemic Medicine; Faculty of Medicine; Helwan University; Cairo Egypt
4. Internal Medicine; Ain Shams University Faculty of Medicine; Cairo Egypt
5. New Pediatric Children Hospital; Cairo University; Cairo Egypt
6. Department of Tropical Diseases; National Hepatology and Tropical Medicine Research Institute; Cairo Egypt
7. Tropical Medicine; Ain Shams University Faculty of Medicine; Cairo Egypt
8. Department of Hepatology; National Liver Institute; Shebin El-Kom Egypt