1. Department of Gastroenterology, Hepatology and Infectious Diseases, National Hepatology and Tropical Medicine Research Institute, Cairo, Egypt.
2. Department of Biochemistry and Molecular Biology, Theodor Bilharz Research Institute, Cairo, Egypt.
3. Department of Clinical Pathology, National Hepatology and Tropical Medicine Research Institute, Cairo, Egypt.
4. Virology and Immunology Unit, Cancer Biology Department, National Cancer Institute, Cairo University, Cairo, Egypt.
5. Department of Microbial Biotechnology, Biotechnology Research Institute, National Research Centre, Giza, Egypt.