title: Letter: Subcutaneous heparin and postoperative deep venous thrombosis.
mesh_terms: D006493:Heparin / Q000008:administration & dosage* / Q000627:therapeutic use*; D006801:Humans; D007279:Injections, Subcutaneous; D011182:Postoperative Care; D011300:Preoperative Care; D013924:Thrombophlebitis / Q000517:prevention & control*; D013997:Time Factors
chemical_list: D006493:Heparin