title: Preventing postoperative thromboembolism.
mesh_terms: D006493:Heparin / Q000627:therapeutic use*; D006801:Humans; D011183:Postoperative Complications / Q000517:prevention & control*; D012107:Research Design; D013923:Thromboembolism / Q000517:prevention & control*; D013924:Thrombophlebitis / Q000517:prevention & control
chemical_list: D006493:Heparin