Peking University - Department of Epidemiology and Biostatistics, affiliation not provided to SSRN, Qingdao University, Peking University Health Science Center - School of Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College (CAMS & PUMC) - Fuwai Hospital, Chinese Academy of Medical Sciences, University of Oxford - MRC Population Health Research Unit, University of Oxford - Medical Research Council Population Health Research Unit (MRC PHRU), University of Oxford - Medical Research Council Population Health Research Unit (MRC PHRU), University of Oxford, University of Oxford - Clinical Trial Service Unit and Epidemiological Studies Unit, affiliation not provided to SSRN, Chinese Center for Disease Control and Prevention (China CDC) - National Institute for Nutrition and Health, China National Center for Food Safety Risk Assessment, University of Oxford - Clinical Trial Service Unit and Epidemiological Studies Unit, Chinese Center for Disease Control and Prevention (China CDC), Peking University - Department of Epidemiology and Biostatistics and Peking University - Department of Epidemiology and Biostatistics