1. Department of Internal Medicine, Division of Digestive Diseases, University of Cincinnati, Cincinnati, OH, USA
2. Department of Medical Microbiology and Immunology, Faculty of Medicine, Assiut University, Assiut, Egypt
3. Department of Gastroenterology & Tropical Medicine, Faculty of Medicine, Assiut University, Assiut, Egypt
4. Assiut Liver Institute for Treatment of Hepatitis C, Assiut, Egypt
5. Department of Pathology, Faculty of Medicine, Assiut University, Assiut, Egypt