1. Department of Tropical Medicine and Infectious Diseases, Faculty of Medicine, Tanta University, Tanta, Egypt;
2. Department of Gastroenterology and Tropical Medicine, Faculty of Medicine, Assiut University, Assiut, Egypt;
3. Department of Anesthesia, Surgical Intensive Care and Pain Medicine, Faculty of Medicine, Tanta University, Tanta, Egypt;
4. Department of Internal Medicine, Ain-Shams University, Cairo, Egypt;
5. Public Health and Community Medicine, Menoufia University, Menoufia, Egypt;
6. Department of Forensic Medicine and Toxicology, Faculty of Medicine, Tanta University, Tanta, Egypt;
7. Department of Internal Medicine, Al-Azhar University, Cairo, Egypt