title: Prevention of fatal postoperative pulmonary embolism by low-dose heparin.
mesh_terms: D002986:Clinical Trials as Topic; D006493:Heparin / Q000008:administration & dosage* / Q000627:therapeutic use; D006801:Humans; D011183:Postoperative Complications / Q000517:prevention & control*; D011655:Pulmonary Embolism / Q000517:prevention & control*; D013557:Switzerland
chemical_list: D006493:Heparin