[1] Xianyang Cent Hosp, Dept Resp & Crit Care Med, Xianyang, Peoples R China
[2] Xianyang Cent Hosp, Dept Neurol, Xianyang, Peoples R China
[3] Xianyang Cent Hosp, Dept Infect Dis, Xianyang, Peoples R China
[4] Lanzhou Univ, Hosp 1, Dept Resp & crit Care Med, Lanzhou, Peoples R China
[5] Xianyang Cent Hosp, Dept Nursing, Xianyang, Peoples R China
[6] Xianyang Cent Hosp, Dept Orthoped, Xianyang, Peoples R China
[7] Xianyang Cent Hosp, Dept Urol Surg, Xianyang, Peoples R China
[8] Xianyang Cent Hosp, Dept Neurol, Xianyang 712000, Peoples R China