作者单位：Fayoum Univ, Fac Med, Dept Med Microbiol & Immunol, Al Fayyum 63514, Egypt[1]Fayoum Univ, Fac Med, Dept Internal Med, Al Fayyum, Egypt[2]Cairo Univ, Fac Med, Dept Med Biochem & Mol Biol, Cairo, Egypt[3]Cairo Univ, Fac Med, Dept Clin Pathol, Cairo, Egypt[4]Fayoum Univ, Dept Microbiol & Immunol, Fac Pharm, Al Fayyum, Egypt[5]Fayoum Univ, Fac Med, Dept Trop Med, Al Fayyum, Egypt[6]
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