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BMC Medical Research Methodology

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Overstating the evidence – double counting in meta-analysis and related problems

BMC Medical Research Methodology20099:10

Received: 18 December 2008

Accepted: 13 February 2009

Published: 13 February 2009

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Open Peer Review reports

Pre-publication versions of this article and author comments to reviewers are available by contacting

Original Submission
18 Dec 2008 Submitted Original manuscript
14 Jan 2009 Reviewed Reviewer Report - Lehana Thabane
28 Jan 2009 Author responded Author comments - Stephen Senn
Resubmission - Version 2
28 Jan 2009 Submitted Manuscript version 2
13 Feb 2009 Editorially accepted
13 Feb 2009 Article published 10.1186/1471-2288-9-10

How does Open Peer Review work?

Open peer review is a system where authors know who the reviewers are, and the reviewers know who the authors are. If the manuscript is accepted, the named reviewer reports are published alongside the article. Pre-publication versions of the article and author comments to reviewers are available by contacting All previous versions of the manuscript and all author responses to the reviewers are also available.

You can find further information about the peer review system here.

Authors’ Affiliations

Department of Statistics, University of Glasgow, Glasgow, UK