About the Authors

Joanne Yaffe

joanne.yaffe@utah.edu

Affiliation College of Social Work, University of Utah, Salt Lake City, Utah, United States of America

Paul Montgomery

Affiliation Centre for Evidence-Based Intervention, University of Oxford, Oxford, United Kingdom

Sally Hopewell

Affiliation Centre for Statistics in Medicine, University of Oxford, Oxford, United Kingdom

Lindsay Dianne Shepard

Affiliation College of Social Work, University of Utah, Salt Lake City, Utah, United States of America

Competing Interests

PM is the author of several empty reviews published by the Cochrane Collaboration. This does not alter the authors' adherence to all the PLoS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: JY PM SH. Performed the experiments: JY PM SH LDS. Analyzed the data: JY LDS. Wrote the paper: JY PM SH LDS. Served as project research assistant: LDS.