1. Department of Pathogenic Biology, Hebei Medical University, Shijiazhuang 050017, China
2. Experimental Center for Teaching, Hebei Medical University, Shijiazhuang 050017, China
3. State Key Laboratory of Virology, Wuhan Institute of Virology, Center for Biosafety Mega Science, Chinese Academy of Sciences, Wuhan 430207, China
4. Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei 230026, China