[Li, Min; Lu, Jia Xi; Shan, Xiao Yun; Yang, Zhen Yu; Mao, De Qian; Jiang, Shan; Yang, Li Chen] Chinese Ctr Dis Control & Prevent, Key Lab Trace Element Nutr Natl Hlth Comm, Natl Inst Nutr & Hlth, Beijing 100050, Peoples R China.
[Shan, Xiao Yun] Univ South China, Sch Publ Hlth, Hengyang Med Sch, Hunan Key Lab Typ Environm Pollut & Hlth Hazards, Hengyang 421001, Hunan, Peoples R China.
[Zou, Yan; Huang, Li Chun] Zhejiang Prov Ctr Dis Prevent & Control, Hangzhou 310051, Zhejiang, Peoples R China.
[Qiu, Qiu Lan; Zhou, Wei Wen] Guangxi Zhuang Autonomous Reg Ctr Dis Control & Pr, Nanning 530028, Guangxi, Peoples R China.
[Liu, Chang Qing; Luo, Xiao Yan] Hebei Prov Ctr Dis Control & Prevent, Shijiazhuang 050021, Hebei, Peoples R China.