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March 23/30, 2005

Permanence of Web Page References—Reply

Author Affiliations

Letters Section Editor: Robert M. Golub, MD, Senior Editor.

JAMA. 2005;293(12):1450. doi:10.1001/jama.293.12.1450-b

In Reply: While Dr Kadhiravan is correct in the description of the NLM initiatives regarding the labeling of permanence levels for URLs,1 unfortunately none of the URL references in our study would have been affected by this change. Although the citations evaluated were from 5 major medical journals, no citation referenced an NLM URL. The referenced URLs included Web pages from commercial resources, nonprofit organizations, and academic research and government Web-based sources.

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