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. 2014 Mar 11;4(3):e004417. doi: 10.1136/bmjopen-2013-004417

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Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions

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Google National Search Trends for “Hospital Compare” and “Healthgrades”, 1 August 2012 to 31 July 2013. Note: search volume data provided by Google Trends for national searches. Transient search increase in mid-January 2013 for “Healthgrades” and mis-spelled “Health Grades” coincides with release of Healthgrades’ Top Hospitals for Outcomes list.