1. Department of Pathogen Biology, School of Basic Medical Sciences, North China University of Science and Technology, Tangshan, Hebei 063210, P.R. China
2. The First Department of General Surgery, Hongqi Hospital Affiliated to Mudanjiang Medical University, Mudanjiang, Heilongjiang 157011, P.R. China
3. Department of Gastrointestinal Surgery, Harbin Medical University Cancer Hospital, Harbin Medical University, Harbin, Heilongjiang 150081, P.R. China
4. Pharmacy Disciplines, Jitang College, North China University of Science and Technology, Tangshan, Hebei 063210, P.R. China
5. Department of Pathogen Biology, Jitang College, North China University of Science and Technology, Tangshan, Hebei 063210, P.R. China