[Tan, Huiyi] Changsha Ctr Dis Control & Prevent, Changsha, Hunan, Peoples R China.
[Tan, Huiyi; Li, ChunYing; Wu, Chengqiu] Univ South China, Hengyang Med Sch, Sch Publ Hlth, Hengyang, Hunan, Peoples R China.
[Liang, Linlong] Changsha Cent Hosp, Changsha, Hunan, Peoples R China.
[Yin, Xiaocheng] Univ South China, Hengyang Med Sch, Affiliated Hosp 1, Hengyang, Hunan, Peoples R China.
[Liu, Fuqiang] Hunan Prov Ctr Dis Control & Prevent, Publ Hlth Emergency Response Off, Changsha, Hunan, Peoples R China.