Follow up of quality of public oriented health information on the world wide web: systematic re-evaluation

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Abstract
On 28 June 2001 we searched articles through the Institute for Scientific Information's citation index for references to the earlier study.1 We searched for the 41 web pages evaluated in the original study to see if they still existed and if they did whether they had been substituted with new pages or their content had been modified. We compared the content with copies of the original pages, and we noted changes and assigned scores by using the guidelines and scoring system applied in the original study.1 We then repeated the 1997 search for new pages, found 40, and scored them as well.