[1] Shanxi Univ Chinese Med, Sch Hlth Serv & Management, Taiyuan, Shanxi, Peoples R China
[2] Shanxi Univ Chinese Med, Natl Int Joint Res Ctr Mol Chinese Med, Shanxi Key Lab Chinese Med Encephalopathy, Taiyuan, Shanxi, Peoples R China
[3] Shanxi Prov Key Lab Major Dis Risk Assessment, Taiyuan, Shanxi, Peoples R China
[4] Shanxi Med Univ, Sch Publ Hlth, Dept Hlth Stat, Taiyuan, Shanxi, Peoples R China