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Previous Volume 347:220 July 18, 2002 Number 3 Next

	Since this article has no abstract, we have provided an extract of the first 100 words of the full text and any section headings.

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To the Editor: With regard to the study by Bergqvist et al. (March 28 issue),¹ since cancer is a risk factor for thromboembolism^2,3 and postsurgical immobilization adds to the risk, was it ethical to conduct a double-blind trial comparing low-molecular-weight heparin with placebo in patients who had undergone surgery for cancer? The significant reduction of the risk in the trial by Bergqvist et al. shows that the placebo group was exposed to a high risk of thromboembolism. Should the postoperative period after any type of major surgery be the subject of a new trial comparing low-molecular-weight heparin with placebo, to . . . [Full Text of this Article]

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N Engl J Med 2002; 347:1724, Nov 21, 2002. Correspondence

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