The Portman GroupBMJ 2010; 340 doi: https://doi.org/10.1136/bmj.b5659 (Published 21 January 2010) Cite this as: BMJ 2010;340:b5659
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This prepublication history comprises all previous versions of the manuscript, the study protocol (submitting the protocol is mandatory for all clinical trials and encouraged for all other studies at The BMJ), the report from the manuscript committee meeting, the reviewers’ comments, and the authors’ responses to all the comments from reviewers and editors.
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