作者单位:Zunyi Med Coll, Coll Nursing, Affiliated Hosp, Zunyi 563000, Guizhou, Peoples R China[1]Zunyi Med Coll, Intens Care Unit, Affiliated Hosp, Zunyi 563000, Guizhou, Peoples R China[2]Zunyi Med Coll, Cell Engn Lab, Affiliated Hosp, Zunyi 563000, Guizhou, Peoples R China[3]