Jinan University, Jinan University, Guangzhou Medical University - Guangdong Women and Children Hospital, Guangdong Provincial Center for Disease Control and Prevention - Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention - Guangdong Provincial Institute of Public Health, Jinan University, Jinan University, Guangdong Provincial Center for Disease Control and Prevention - Guangdong Provincial Institute of Public Health, Jinan University, Guangdong Provincial Center for Disease Control and Prevention - Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention - Guangdong Provincial Institute of Public Health, affiliation not provided to SSRN, Jinan University, affiliation not provided to SSRN, Southern Medical University, Guangdong Provincial Center for Disease Control and Prevention - Guangdong Provincial Institute of Public Health and Jinan University - Department of Public Health and Preventive Medicine