About the Authors

Stuart G. Nicholls

Affiliations Department of Epidemiology and Community Medicine, University of Ottawa, Ottawa, Canada, Children′s Hospital of Eastern Ontario Research Institute, Ottawa, Canada

Pauline Quach

Affiliation Institute for Clinical Evaluative Sciences, Toronto, Canada

Erik von Elm

Affiliation Cochrane Switzerland, Institute of Social and Preventive Medicine, University of Lausanne, Lausanne, Switzerland

Astrid Guttmann

Affiliations Institute for Clinical Evaluative Sciences, Toronto, Canada, Hospital for Sick Children, Department of Paediatrics and Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, Canada

David Moher

Affiliations Department of Epidemiology and Community Medicine, University of Ottawa, Ottawa, Canada, Ottawa Hospital Research Institute, Ottawa, Canada

Irene Petersen

Affiliation Department of Primary Care and Population Health, University College London, London, United Kingdom

Henrik T. Sørensen

Affiliation Department of Clinical Epidemiology, Aarhus University, Aarhus, Denmark

Liam Smeeth

Affiliation London School of Hygiene and Tropical Medicine, London, United Kingdom

Sinéad M. Langan

Contributed equally to this work with: Sinéad M. Langan, Eric I. Benchimol

Affiliation London School of Hygiene and Tropical Medicine, London, United Kingdom

Eric I. Benchimol

Contributed equally to this work with: Sinéad M. Langan, Eric I. Benchimol

ebenchimol@cheo.on.ca

Affiliations Department of Epidemiology and Community Medicine, University of Ottawa, Ottawa, Canada, Children′s Hospital of Eastern Ontario Research Institute, Ottawa, Canada, Institute for Clinical Evaluative Sciences, Toronto, Canada, Department of Pediatrics, Children′s Hospital of Eastern Ontario, University of Ottawa, Ottawa, Canada

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: SGN EvE AG DM IP HTS LM SML EIB. Performed the experiments: SGN PQ SML EIB. Analyzed the data: SGN PQ SML EIB. Contributed reagents/materials/analysis tools: SGN PQ SML EIB. Wrote the paper: SGN PQ EvE AG DM IP HTS LM SML EIB.