Guangzhou Medical University, Guangzhou Medical University - Guangdong Women and Children Hospital, Guangzhou Medical University, Guangzhou Medical University, Guangzhou Medical University, Guangzhou Medical University, Guangzhou Medical University, Tsinghua University - Vanke School of Public Health, University of Wolverhampton, Monash University, Guangdong Institute of Family Planning Science and Technology, University of Wolverhampton - Faculty of Education, Health and Wellbeing, Huazhong University of Science and Technology - Department of Maternal and Child Healthcare, Guangzhou Medical University - School of Public Health, Guangxi Medical University and Guangzhou Medical University - Department of Preventive Medicine