[1] Sichuan Univ, West China Hosp, Dept Gen Surg, Div Liver Surg, 37 Guo Xue Rd, Chengdu 610041, Sichuan, Peoples R China
[2] Sichuan Univ, West China Hosp, Inst Rehabil Med, Rehabil Med Ctr, Chengdu, Peoples R China
[3] Key Lab Rehabil Med Sichuan Prov, Chengdu, Peoples R China
[4] Sichuan Univ, West China Sch Publ Hlth, Dept Epidemiol & Hlth Stat, Chengdu, Peoples R China
[5] Sichuan Univ, West China Hosp 4, Chengdu, Peoples R China