[1] Peking Univ, Sch Publ Hlth, Dept Global Hlth, 38 Xue Yuan Rd, Beijing, Peoples R China
[2] China Acad Railway Sci Co Ltd, Energy Saving & Environm Protect & Occupat Safety, Beijing 100081, Peoples R China
[3] Peking Univ, Sch Publ Hlth, Dept Epidemiol & Biostat, Beijing, Peoples R China
[4] Beijing Ctr Dis Prevent & Control, Inst Immunizat & Prevent, Beijing, Peoples R China
[5] Peking Univ, Sch Basic Med Sci, Dept Biomed Informat, Beijing, Peoples R China