Wu Yongning, Chen Yan
Key Laboratory of Food Safety Risk Assessment, Ministry of Health and China National Center for Food Safety Risk Assessment, 7 Panjiayuan Nanli, Chaoyang District, Beijing 100021, China.
J Epidemiol Community Health. 2013 Jun;67(6):478-9. doi: 10.1136/jech-2012-201767. Epub 2013 Jan 15.