1. Electron Microscopy Research Department (Pathology), Theodor Bilharz Research Institute, Cairo, Egypt
2. Pathology Department, Faculty of Medicine, Cairo University, Egypt
3. Hepatogastroenterology Department, Theodor Bilharz Research Institute, Cairo, Egypt
4. Pathology Department, Theodor Bilharz Research Institute, Cairo, Egypt
5. Hepatobiliary Surgery and Liver Transplantation, National Hepatology and Tropical Medicine Research Institute, Cairo, Egypt
6. Surgery Department, Faculty of Medicine, Ain Shams University, Cairo, Egypt