Internet citations in oncology journals: a vanishing resource?

Abstract
An estimated one-third of oncology patients use the Internet to obtain cancer-related information ( 1 ) . Scientific articles increasingly refer clinicians and researchers to information available only on the Internet. Internet information, however, may vanish unexpectedly ( 2 ) . The ephemeral nature of Internet citations results from each Internet address (uniform resource locator [URL]) specifying both the identifier and location of the electronic content. Internet citations may therefore become inaccessible because of changed locations of cited information without appropriate forwarding links, removal of cited information from the Internet, or equipment failure.

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