Letter: prophylaxis against deep vein thrombosis.
D003911:Dextrans / Q000627:therapeutic use*; D006493:Heparin / Q000627:therapeutic use*; D006801:Humans; D011312:Pressure; D013923:Thromboembolism / Q000517:prevention & control*
D003911:Dextrans; D006493:Heparin