1. College of Food Science and Nutritional Engineering, China Agricultural University and Key Laboratory of Safety Assessment of Genetically Modified Organism (Food Safety), Ministry of Agriculture, 17 Tsinghua East Road, Beijing 100083, P. R. China
2. NMPA Key Laboratory for Testing Technology of Pharmaceutical Microbiology, Shanghai Institute for Food and Drug Control, 1500 Zhangheng Road, Shanghai, 201203, P. R. China