title: Prophylactic anticoagulation.
mesh_terms: D006801:Humans; D010630:Phenindione / Q000627:therapeutic use; D013923:Thromboembolism / Q000517:prevention & control*; D013997:Time Factors; D014859:Warfarin / Q000627:therapeutic use
chemical_list: D010630:Phenindione; D014859:Warfarin