1. Department of Microbiology, The Medicine School of Hunan University of Chinese Medicine, Changsha, Hunan, 410208, People's Republic of China
2. School of Basic Medical Science, Changsha Medical University, Changsha, Hunan, 410219, People's Republic of China
3. Experimental Center of Molecular Biology, The Medicine School of Hunan University of Chinese Medicine, Changsha, Hunan, 410208, People's Republic of China