1. Key Laboratory of Public Health Safety of The Ministry of Education, School of Public Health, Fudan University, Shanghai 200032, P.R. China
2. Department of Microbiology and Microbial Engineering, School of Life Sciences, Fudan University, Shanghai 200438, P.R. China
3. Shanghai Institute of Quality Inspection and Technical Research, National Quality Supervision and Inspection Center for Food Products (Shanghai), Shanghai 200233, P.R. China