1. Department of Nutrition and Food Hygiene, School of Public Health, Health Science Centre, Peking University, Beijing 100191, China
2. Institute for Chronic and Non-Communicable Disease Control and Prevention, Ningxia Center for Disease Control and Prevention, Yinchuan 750004, China
3. Beijing Key Laboratory of Toxicological Research and Risk Assessment for Food Safety, Peking University, Beijing 100191, China