1. Endemic Medicine Department, Faculty of Medicine, Cairo University, Cairo, Egypt
2. Department of Hepatology, National Liver Institute, Menoufiya University, Menoufiya, Egypt
3. Tropical Medicine Department, Faculty of Medicine, Ain Shams University, Cairo, Egypt
4. Internal Medicine Department, Zagazig University, Sharkia, Egypt
5. Department of Tropical Medicine and Hepatology, Faculty of Medicine, Mansoura University, Mansoura, Egypt
6. Department of Hepatogastroenterology and Infectious Diseases, Al-Azhar University, Cairo, Egypt
7. Medical Research Division, National Research Center, Giza, Egypt
8. Tropical Medicine Department, National Hepatology & Tropical Medicine Research Institute, Cairo, Egypt