State University of New York (SUNY) - Departments of Environmental Health Sciences and Epidemiology and Biostatistics, Southern Medical University - Department of Sexually Transmitted Diseases Prevention and Control, Sun Yat-sen University (SYSU) - School of Public Health, London School of Hygiene & Tropical Medicine, Sun Yat-sen University (SYSU) - School of Public Health, State University of New York (SUNY) - Department of Environmental Health Sciences, The University of Hong Kong - Department of Urban Planning and Design, Shenzhen Women and Children Hospital - Department of Children Health Care, Sun Yat-sen University (SYSU) - Department of Health Policy and Management and Family Planning Special Hospital of Guangdong - Epidemiology Research Office of key Laboratory of Male Reproduction and Genetics (National Health Commission)