University of Oxford - Clinical Trial Service Unit and Epidemiological Studies Unit (CTSU), University of Oxford - Clinical Trial Service Unit and Epidemiological Studies Unit (CTSU), Chinese Academy of Medical Sciences, Qingdao CDC, University of Oxford - Clinical Trial Service Unit and Epidemiological Studies Unit (CTSU), Qingdao CDC, Chinese Academy of Medical Sciences, University of Oxford - Medical Research Council Population Health Research Unit (MRC PHRU), University of Oxford - Medical Research Council Population Health Research Unit (MRC PHRU), Peking University Health Science Center - School of Public Health, University of Oxford - Clinical Trial Service Unit and Epidemiological Studies Unit (CTSU), Peking University Health Science Center - School of Public Health, China National Center for Food Safety Risk Assessment, Peking University - Department of Epidemiology and Biostatistics, University of Oxford - Clinical Trial Service Unit and Epidemiological Studies Unit (CTSU) and Boston Children's Hospital - Division of Endocrinology and Center for Basic and Translational Obesity Research