1. Endemic Medicine and Hepatology Department, Faculty of Medicine, Cairo University, Cairo, Egypt
2. Medical Research Division, National Research Center, Giza, Egypt
3. Department of Gastroenterology, Hepatology and Endemic Medicine, Faculty of Medicine, Beni-Suef University, Beni-suef, Egypt
4. Tropical Medicine Department, Faculty of Medicine, Fayoum University, Al Fayoum, Egypt