1 School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen, Guangdong Province, China; Nanshan District Center for Disease Control and Prevention, Shenzhen, Guangdong Province, China.
2 School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen, Guangdong Province, China.
3 Nanshan District Center for Disease Control and Prevention, Shenzhen, Guangdong Province, China. Electronic address: jianhui_yuan@126.com.
4 School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen, Guangdong Province, China. Electronic address: zouhuachun@mail.sysu.edu.cn.
5 Department of Epidemiology, School of Public Health, Boston University, Boston, MA, USA.
6 School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen, Guangdong Province, China; Nanshan District Center for Disease Control and Prevention, Shenzhen, Guangdong Province, China. Electronic address: yangchg9@mail.sysu.edu.cn.