1. Pediatric Hepatology; Faculty of Medicine; Cairo University; Cairo Egypt
2. Tropical Medicine; Hepatology and Endemic Medicine; Theodore Bilharz Research Institute; Cairo Egypt
3. Department of Gastroenterology; Hepatology and Endemic Medicine; Minia University Hospitals; Minia Egypt
4. Pediatrics; Faculty of Medicine; Alexandria University; Alexandria Egypt
5. Green Clinic Research Center (CRC); Alexandria Egypt