6 School of Medicine, Jiangsu University, No. 301 Xuefu Road, Zhenjiang, Jiangsu, China. szl30@ujs.edu.cn.
7 Department of Microbiology, Hua Dong Research Institute for Medicine and Biotechnics, No. 293 Zhongshan East Road, Nanjing, Jiangsu, China. panxiuzhen_2004@163.com.