1. Beijing Key Laboratory of Diagnostic and Traceability Technologies for Food Poisoning, Beijing Center for Disease Prevention and Control, Beijing 100013, P. R. China
2. School of Police Law Enforcement Abilities Training, People’s Public Security University of China, Beijing 100038, P. R. China
3. School of Public Health, Capital Medical University, Beijing 100069, P. R. China
4. Department of Chemical Engineering, University College London, Torrington Place, London WC1E7JE, United Kingdom
5. Beijing Advanced Innovation Center for Food Nutrition and Human Health, China Agricultural University, Beijing 100193, P. R. China
6. State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, P. R. China