[Zhou, Qi; Xuan, Zeliang; Chen, Yuanfang; Liu, Jingyi; Wu, Qiangsong] Xuhui Dist Ctr Dis Control & Prevent, Shanghai, Peoples R China.
[Zhang, Linwei] Univ South China, Sch Publ Hlth, Hengyang, Hunan, Peoples R China.
[Hu, Yi] Dept Epidemiol, Shanghai, Peoples R China.
[Hu, Yi] Fudan Univ, Sch Publ Hlth, Key Lab Publ Hlth Safety, Minist Educ, Shanghai, Peoples R China.
[Hu, Yi] Fudan Univ, Sch Publ Hlth, 130 Dongan Rd, Shanghai 200032, Peoples R China.