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Acknowledgements
The editors are grateful to:
BMJ for making a free link to the pdf of this article available (email to Iain Chalmers from Fiona Godlee, 05 May 2015).
Download the full article as a PDF
The editors are grateful to:
BMJ for making a free link to the pdf of this article available (email to Iain Chalmers from Fiona Godlee, 05 May 2015).
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