Sichuan University - Chinese Evidence-Based Medicine Centre, Sichuan University - Chinese Evidence-Based Medicine Centre, Sichuan University - Department of Epidemiology and Biostatistics, Sichuan University - Chinese Evidence-Based Medicine Centre, Sichuan University - Chinese Evidence-Based Medicine Centre, Sichuan University - Chinese Evidence-Based Medicine Centre, Sichuan University - Key Laboratory of Birth Defects and Related Diseases of Women and Children of Ministry of Education, McMaster University - Department of Health Research Methods, Evidence, and Impact (HEI), Sichuan University - Key Laboratory of Birth Defects and Related Diseases of Women and Children of Ministry of Education and Sichuan University - Chinese Evidence-Based Medicine Centre

Sichuan University - Department of Maternal, Child and Adolescent Health, Sichuan Center for Disease Control and Prevention, Shandong University, Huazhong University of Science and Technology - School of Medicine and Health Management, Guangzhou Medical University, Chinese Center for Disease Control and Prevention (China CDC), Sichuan University, Sichuan University and Sichuan University - Department of Epidemiology and Biostatistics