[Liu, Jun; Zhan, Chunhua; Yang, Yue; Yang, Fei; Wang, Yaqi] Univ South China, Sch Basic Med Sci, Sch Publ Hlth, Hunan Key Lab Typ Environm Pollut & Hlth Hazards,H, Hengyang 421001, Hunan, Peoples R China.
[Zeng, Wen; Zhan, Chunhua] Cent Hosp Shaoyang, Dept Publ Hlth, Shaoyang, Peoples R China.
[Yuan, Mei] Univ South China, Affiliated Hosp 2, Hengyang Med Sch, Dept Neurol, Hengyang, Hunan, Peoples R China.
[Zhan, Chunhua] Univ South China, Key Lab Rare Pediat Dis, Minist Educ, Hengyang 421001, Hunan, Peoples R China.