1. Department of Internal Medicine; Division of Digestive Diseases; University of Cincinnati; Cincinnati Ohio USA
2. Department of Medical Microbiology and Immunology; Faculty of Medicine; Assiut University; Assiut Egypt
3. Department of Gastroenterology and 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