About the Authors

Denise Thomson

dthomson@ualberta.ca

Affiliation Cochrane Child Health Field, Department of Pediatrics, University of Alberta, Edmonton, Canada

Lisa Hartling

Affiliation Alberta Research Centre for Health Evidence, Department of Pediatrics, University of Alberta, Edmonton, Canada

Eyal Cohen

Affiliation Hospital for Sick Children, Department of Pediatrics, University of Toronto, Toronto, Canada

Ben Vandermeer

Affiliation Alberta Research Centre for Health Evidence, Department of Pediatrics, University of Alberta, Edmonton, Canada

Lisa Tjosvold

Affiliations Cochrane Child Health Field, Department of Pediatrics, University of Alberta, Edmonton, Canada, Alberta Research Centre for Health Evidence, Department of Pediatrics, University of Alberta, Edmonton, Canada

Terry P. Klassen

Affiliations Cochrane Child Health Field, Department of Pediatrics, University of Alberta, Edmonton, Canada, Alberta Research Centre for Health Evidence, Department of Pediatrics, University of Alberta, Edmonton, Canada

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Contributed to the conception and design of the review: DT LH EC TK. Supervised the data extraction and interpretation of results: DT. Drafted the manuscript: DT LH EC BV TK. Provided critical revision of the manuscript for important intellectual content: LH EC TK. Contributed to the data synthesis plan and data processing: BV. Carried out the statistical analysis and interpretation: BV. Coordinated the Child Health Field Trials Register: LT. Assisted with extracting the sample for this project: LT. Assisted with manuscript preparation: LT. Obtained funding for the project: TK.