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. 2014 Apr 5;4(4):e004083. doi: 10.1136/bmjopen-2013-004083

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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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Flow chart of included and excluded studies selected for this meta-analysis. AD, Alzheimer disease; RCT, randomised controlled trial; NICE, National Institute for Health and Care Excellence.