[Qin, Shuangjian; Xiao, Fang; Zeng, Ming; Xiao, F; Li, Boru] Cent South Univ, Xiangya Sch Publ Hlth, Changsha 410078, Hunan, Peoples R China.
[Xu, Xinyun; Cai, Ying; Qin, Shuangjian; Li, Runbing; Li, Boru; Zheng, Kai; Huang, Haiyan] Shenzhen Ctr Dis Control & Prevent, Inst Environm & Hlth, Shenzhen 518055, Guangdong, Peoples R China.
[Cai, Ying; Li, Runbing; Zheng, Kai] Univ South China, Sch Publ Hlth, Hengyang 421001, Hunan, Peoples R China.