1. Faculty of Medicine, Endemic Medicine and Hepatology Department, Cairo University, Cairo, Egypt.
2. Tropical Medicine Department, National Hepatology and Tropical Medicine Research Institute, Cairo, Egypt.
3. National Liver Institute, Menoufiya University, Shebeen EL Kom, Egypt.
4. Faculty of Medicine, Pediatric Department, Ain Shams University, Cairo, Egypt.
5. Faculty of Medicine, Tropical Medicine Department, Ain Shams University, Cairo, Egypt.
6. Faculty of Medicine, Internal Medicine Department, Ain Shams University, Cairo, Egypt.
7. Internal Medicine Department, Cairo University, Cairo, Egypt.