[1] Sichuan Univ, West China Sch Publ Hlth, HEOA Grp, 16,Sect 3,Ren Min Nan Rd, Chengdu 610041, Sichuan, Peoples R China
[2] Sichuan Univ, West China Hosp 4, 16,Sect 3,Ren Min Nan Rd, Chengdu 610041, Sichuan, Peoples R China
[3] Sichuan Univ, Inst Hlth Cities, 16,Sect 3,Ren Min Nan Rd, Chengdu 610041, Sichuan, Peoples R China
[4] Sichuan Univ, West China Res Ctr Rural Hlth Dev, 6,Sect 3,Ren Min Nan Rd, Chengdu 610041, Sichuan, Peoples R China
[5] Hlth Informat Ctr Sichuan Prov, 10,Da Xue Rd, Chengdu 610041, Sichuan, Peoples R China
[6] Sichuan Univ, Sch Publ Adm, 24 South Sect 1,Yihuan Rd, Chengdu 610065, Sichuan, Peoples R China