About the Authors

Sarah L. Gorst

sgorst@liverpool.ac.uk

Affiliation MRC North West Hub for Trials Methodology Research (NWHTMR), Department of Biostatistics, University of Liverpool, Liverpool, United Kingdom

Elizabeth Gargon

Affiliation MRC North West Hub for Trials Methodology Research (NWHTMR), Department of Biostatistics, University of Liverpool, Liverpool, United Kingdom

Mike Clarke

Affiliation Northern Ireland Network for Trials Methodology Research, Queen's University Belfast, Belfast, United Kingdom

Valerie Smith

Affiliation School of Nursing & Midwifery, Trinity College Dublin, Dublin, Ireland

Paula R. Williamson

Affiliation MRC North West Hub for Trials Methodology Research (NWHTMR), Department of Biostatistics, University of Liverpool, Liverpool, United Kingdom

Competing Interests

MC and PRW are members of the COMET Management Group and coapplicants on grants to support COMET and related work. EG is a member of the COMET Management Group and is the COMET Project Co-ordinator. This does not alter the authors' adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Conceptualization: EG PRW. Funding acquisition: PRW MC. Investigation: SLG EG VS. Methodology: EG MC PRW. Writing – original draft: SLG. Writing – review & editing: SLG EG MC VS PRW.