1. Department of Hepatology, Gastroenterology, and Infectious Diseases, Faculty of Medicine, Kafrelsheikh University , Kafr El-Sheikh, Egypt
2. Department of Hepato-Gastroenterology and Infectious Diseases, Faculty of Medicine, Al-Azhar University , Cairo, Egypt
3. Department of Tropical Medicine, Faculty of Medicine, Zagazig University , Zagazig, Egypt