1. Hepatology and Gastroenterology Unit, Internal Medicine Department, Faculty of Medicine, Mansoura University, El Mansoura, Egypt
2. Egyptian Liver Research Institute and Hospital (ELRIAH), Sherbin, El Mansoura, Egypt
3. Tropical Medicine Department, Faculty of Medicine, Port Said University, Port Said, Egypt
4. Higher Institute of Applied Medical Sciences, Sherbin, El Mansoura, Egypt
5. Biostatistics and Cancer Epidemiology Department, South Egypt Cancer Institute, Assuit University, Assuit, El Fateh, Egypt