Department of Anesthesiology, the First Affiliated Hospital of Hebei North University, Zhangjiakou 075000, China;
Department of Anesthesiology, the First Affiliated Hospital of Hebei North University, Zhangjiakou 075000, China;
Department of Blood Transfusion, the First Affiliated Hospital of Hebei North University,Zhangjiakou 075000, China;
Department of Anesthesiology, the First Affiliated Hospital of Hebei North University, Zhangjiakou 075000, China;