1. Department of Hepatogastroenterology and Infectious Diseases, National Hepatology and Tropical Medicine Research Institute, Cairo, Egypt
2. Department of Hepatogastroenterology and Infectious Diseases, Al-Azhar University, Cairo, Egypt
3. Department of Pulmonary Medicine, Faculty of Medicine, Cairo University, Cairo, Egypt
4. Department of Pulmonary Medicine, Faculty of Medicine, Ain Shams University, Cairo, Egypt
5. Department of Critical Care, Faculty of Medicine, Cairo University, Cairo, Egypt
6. Division of Tropical Medicine Medical Research, National Research Centre, Giza, Egypt
7. Department of Public Health and Community Medicine, Faculty of Medicine, Cairo University, Cairo, Egypt
8. Ministry of Health and Population, Egypt
9. Tropical Medicine and Gastroenterology Department, Aswan University, Aswan, Egypt
10. Hepatogastroenterology and Infectious Diseases Department, Al-Azhar University, Damietta, Egypt
11. Department of Chest, Faculty of Medicine, Aswan University, Aswan, Egypt
12. Department of Epidemiology and Preventive Medicine, National Liver Institute, Menoufia University, Menofia Governorate, Egypt