title: Letter to the editor.
authors.forename: Steven T
authors.initials: ST
authors.lastname: Woolson
mesh_terms: D000925:Anticoagulants / Q000009:adverse effects*; D019645:Arthroplasty, Replacement, Knee; D006801:Humans; D011183:Postoperative Complications / Q000517:prevention & control*; D012107:Research Design; D012189:Retrospective Studies; D020246:Venous Thrombosis / Q000517:prevention & control; D014859:Warfarin / Q000009:adverse effects
chemical_list: D000925:Anticoagulants; D014859:Warfarin