1 Department of Food Safety and Nurition, Beijing Center for Disease Control and Prevention; Beijing Key Laboratory of Diagnostic and Traceability Techonolgies for Food Poisoning, Beijing 100013, China.
2 Department of Food Safety and Nurition, Beijing Center for Disease Control and Prevention; Beijing Key Laboratory of Diagnostic and Traceability Techonolgies for Food Poisoning, Beijing 100013, China. Email: [email protected].