[1] Harbin Med Univ, Affiliated Hosp 1, Dept Crit Care Med, 23 Youzheng St, Harbin 150001, Heilongjiang, Peoples R China
[2] Harbin Med Univ, Sino Russian Med Res Ctr, Inst Crit Care Med, Harbin 150081, Heilongjiang, Peoples R China
[3] Harbin Med Univ, Affiliated Hosp 2, Dept Crit Care Med, Harbin 150086, Heilongjiang, Peoples R China