How complete, accurate, and reliable is the drug information that Americans retrieve from Wikipedia? The question is important because 74% of American adults look online for health information [1], and Wikipedia is the 7th-most visited site on the web [2]. Consumers using general search engines like Google or Yahoo often arrive at Wikipedia. A study using keywords from 3 health indexes found that Wikipedia ''ranked among the first ten results in 71-85% of search engines and keywords tested,'' with its articles viewed more frequently than the corresponding MedlinePlus topic page Practitioners also go regularly to Wikipedia for health information. A 2009 study of 1,900 physicians found that 50% used Wikipedia to answer health questions, twice the percentage of the year before Other studies found that Wikipedia was used by 70% of 35 ''junior physicians'' who graduated from a major London medical school
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Kupferberg et al. (2011) studied this question.
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