1. Internal Medicine Department, Faculty of Medicine, Tanta University, Tanta, Egypt
2. Tropical Medicine Department, Faculty of Medicine, Tanta University, Tanta, Egypt
3. Hepato-gastroentrology department, National Hepatology and Tropical Medicine Research Institute,Cairo, Egypt
4. Clinical pathology department, National hepatolgy and tropical medicine research institute, Cairo, Egypt
5. Department of Hepatology and Gastroenterology,Benha Teaching Hospital, Benha, Egypt
6. Hepatology, Gastroenterology and Infectious Diseases Department, Mahala Hepatology Teaching Hospital, Gharbia, Egypt