Southern Medical University - School of Public Health, Guilin University of Electronic Technology, Guangdong Provincial Center for Disease Control and Prevention, Guangdong Provincial Center for Disease Control and Prevention, Southern Medical University - School of Public Health, Guangdong Provincial Institute of Public Health, Guangdong Provincial Institute of Public Health, Southern Medical University, Guangdong Provincial Center for Disease Control and Prevention, Guangdong Provincial Center for Disease Control and Prevention, Guangdong Provincial Center for Disease Control and Prevention, Guilin University of Electronic Technology - School of Mathematics and Computing Science and Guangdong Provincial Center for Disease Control and Prevention