About the Authors
- Julie Hennegan
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* E-mail: julie.hennegan@spi.ox.ac.uk
Affiliation Centre for Evidence-Based Intervention, University of Oxford, Oxford, United Kingdom
- Paul Montgomery
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Affiliation Centre for Evidence-Based Intervention, University of Oxford, Oxford, United Kingdom
Competing Interests
PM is the author of an included study and the authors are involved in an ongoing trial in this area. Authors evaluated all eligible trials objectively, consistent with the review protocol http://www.crd.york.ac.uk/PROSPERO/display_record.asp?ID=CRD42014010631. This does not alter the authors' adherence to PLOS ONE policies on sharing data and materials.
Author Contributions
Conceived and designed the experiments: JH PM. Performed the experiments: JH PM. Analyzed the data: JH PM. Wrote the paper: JH PM. Conducted the searches: JH. Screened titles and provided risk of bias assessment for included studies: JH PM. Extracted study data and drafted the initial manuscript, edited by both authors: JH. Have read and approved the final manuscript: JH PM.
