title: Prophylaxis of postoperative thromboembolism.
mesh_terms: D006493:Heparin / Q000008:administration & dosage; D006801:Humans; D011183:Postoperative Complications / Q000517:prevention & control*; D013923:Thromboembolism / Q000209:etiology / Q000517:prevention & control*; D013997:Time Factors
chemical_list: D006493:Heparin