Document Type : Original Article
Authors
1 Epidemiology and Preventive Medicine Department National Liver Institute, Menoufia University, Menoufia, Egypt.
2 Clinical Microbiology and Immunology Department, National Liver Institute, Menoufia University, Menoufia, Egypt.
3 Epidemiology and preventive medicine, National Liver Institute, Menoufia University
4 Lecturer in Epidemiology and Preventive Medicine Department,National Liver Institute, Menoufia University, Menoufia, Egypt.
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