title: Efficacy of low-dose heparin prophylaxis.
mesh_terms: D000925:Anticoagulants / Q000627:therapeutic use; D002986:Clinical Trials as Topic; D003911:Dextrans / Q000627:therapeutic use; D006493:Heparin / Q000008:administration & dosage / Q000627:therapeutic use*; D006801:Humans; D011655:Pulmonary Embolism / Q000517:prevention & control*; D013924:Thrombophlebitis / Q000517:prevention & control*
chemical_list: D000925:Anticoagulants; D003911:Dextrans; D006493:Heparin