Suggested answer to "A question for you"

This is described as a randomised trial, but the only randomisation is between two super-clusters each of 6 review groups. This cannot make the two groups comparable, only the judgement of the researcher who grouped them could do that. Hence it is not a randomised trial.

Read the Rapid Responses to this paper (including mine) and the authors' reply, at the end of the paper.

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Last updated: 16 July, 2009.

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