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Previous Volume 337:1247-1248 October 23, 1997 Number 17 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: Dr. Magid and colleagues (June 12 issue)¹ provide interesting data on the correlates of delays in seeking treatment among patients with acute myocardial infarction. Because they studied only one health maintenance organization (HMO), the authors are appropriately circumspect about generalizing the observed nonassociation between cost sharing and treatment delay to other HMOs and to low-income populations at risk. However, the report and Dr. Selby's editorial² neglect to discuss an important limitation to internal validity that should have tempered their conclusion that "in this HMO, the requirement of modest, fixed copayments for emergency services did not lead to . . . [Full Text of this Article]

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