1. Department of Medical Microbiology and Immunology, Faculty of Medicine, Assiut University, Assiut 71515, Egypt
2. Gilbert and Rose-Marie Chagoury School of Medicine, Lebanese American University, Byblos P.O. Box 36, Lebanon
3. Molecular Biology Researches & Studies Institute (MBRSI), Assiut University, Assiut 71515, Egypt
4. Microbiology and Immunology Department, Faculty of Pharmacy, Assiut University, Assiut 71515, Egypt
5. Department of Medical Biochemistry, Faculty of Medicine, Assiut University, Assiut 71515, Egypt
6. Department of Tropical Medicine and Gastroenterology, Faculty of Medicine, Assiut University, Assiut 71515, Egypt
7. Department of Tropical Medicine and Gastroenterology, Faculty of Medicine, Aswan University, Aswan 81528, Egypt
8. Department of Clinical Pathology, Faculty of Medicine, Sohag University, Sohag 82524, Egypt
9. Department of Internal Medicine, Gastroenterology and Hepatology Unit, Faculty of Medicine, Assiut University, Assiut 71515, Egypt
10. Pediatric Department, Faculty of Medicine, Aswan University, Aswan 81528, Egypt