1. Peking University Health Science Center, Beijing, China
2. Peking University Institute of Environmental Medicine, Beijing, China
3. Chinese Academy of Medical Sciences, Beijing, China
4. Nuffield Department of Population Health, University of Oxford, Oxford, UK
5. Maiji Center for Disease Control and Prevention, Maiji, China
6. Sichuan Center for Disease Control and Prevention, Chengdu, China
7. China National Center for Food Safety Risk Assessment, Beijing, China
8. School of Public Health and Tropical Medicine, Tulane University, New Orleans, LA, USA
9. Harvard School of Public Health, Boston, MA, USA