title: Prevention of fatal postoperative thromboembolism by heparin prophylaxis.
mesh_terms: D000368:Aged; D001780:Blood Coagulation Tests; D005260:Female; D006493:Heparin / Q000627:therapeutic use*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000517:prevention & control; D013923:Thromboembolism / Q000209:etiology / Q000401:mortality / Q000517:prevention & control*
chemical_list: D006493:Heparin