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. 2014 Nov 19;15:63. doi: 10.1186/2050-6511-15-63

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© Loveman et al.; licensee BioMed Central Ltd. 2014

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Flow chart for the identification of studies in the clinical effectiveness review. ^a Two RCTs were reported in one publication; two further trials each had two linked publications. ^b One trial was published as a protocol only.