title: Preventing venous thrombosis and pulmonary embolism.
mesh_terms: D006493:Heparin / Q000008:administration & dosage*; D006801:Humans; D011655:Pulmonary Embolism / Q000517:prevention & control*; D013514:Surgical Procedures, Operative; D013924:Thrombophlebitis / Q000517:prevention & control*
chemical_list: D006493:Heparin