About the Authors

Peter J. Gill

peter.gill@phc.ox.ac.uk

Affiliations Department of Primary Care Health Sciences, University of Oxford, Oxford, United Kingdom, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Canada

Kay Yee Wang

Affiliation Department of Primary Care Health Sciences, University of Oxford, Oxford, United Kingdom

David Mant

Affiliation Department of Primary Care Health Sciences, University of Oxford, Oxford, United Kingdom

Lisa Hartling

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

Carl Heneghan

Affiliation Department of Primary Care Health Sciences, University of Oxford, Oxford, United Kingdom

Rafael Perera

Affiliation Department of Primary Care Health Sciences, University of Oxford, Oxford, United Kingdom

Terry Klassen

Affiliations Department of Pediatrics, Cochrane Child Health Field, University of Alberta, Edmonton, Canada, Department of Pediatrics and Child Health, Manitoba Institute of Child Health, University of Manitoba, Winnipeg, Canada

Anthony Harnden

Affiliation Department of Primary Care Health Sciences, University of Oxford, Oxford, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: PG KW DM LH CH RP TK AH. Performed the experiments: PG KW DM CH AH. Analyzed the data: PG KW DM CH RP AH. Wrote the paper: PG KW DM LH CH RP TK AH. Provided input on the data analysis: KW DM LH CH RP TK AH. Provided clinical advice: KW DM CH TK AH. Provided methodological advice: LH CH TK. Provided critical revision of the manuscript for important intellectual content: KW DM LH CH RP TK AH.