the safety and efficacy of low molecular heparin ( sandoz ag , nurnberg ) , given 1500 aptt once daily ( and two placebo injections ) , in preventing postoperative venous thromboembolism , was assessed against sodium heparin at a dose of 5000 iu three times daily , in a unicenter double-blind randomized study .
C0019134
heparin
C0037513
sodium heparin