About the Authors

Gavin B. Stewart

gavin.stewart@newcastle.ac.uk

Current address: School of Agriculture, Food and Rural Development, Newcastle University, Newcastle upon Tyne, United Kingdom.

Affiliation Centre for Reviews and Dissemination, University of York, York, United Kingdom

Julian P. T. Higgins

Affiliations Centre for Reviews and Dissemination, University of York, York, United Kingdom, School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom

Holger Schünemann

Affiliation Department of Clinical Epidemiology & Biostatistics, McMaster University Health Sciences Centre, Hamilton, ON, Canada

Nick Meader

Affiliation Centre for Reviews and Dissemination, University of York, York, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: GS NM. Performed the experiments: GS NM JH. Analyzed the data: GS NM. Contributed reagents/materials/analysis tools: GS NM JH HS. Wrote the paper: GS NM JH HS.