1. School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China
2. National Institution of Biological Sciences, Beijing, No. 7 Science Park Road, Zhongguancun Life Science Park, Beijing 102206, China
3. State Key Laboratory of Microbial Technology, Shandong University, Qingdao City, Shandong Province, 266237, China