Department of Anesthesiology;
Dingzhou people's Hospital;
Hebei;
China;
Anesthesia Center;
National Center for Cardiovascular Diseases;
Fuwai Hospital;
Chinese Academy of Medical Sciences and Peking Union Medical College;
Beijing;
China;
Heparin-induced; thrombocytopenia; unfractionated; heparin; low-molecular-weight; heparin;