About the Authors

Thomas R. Fanshawe

Roles Conceptualization, Formal analysis, Investigation, Software, Supervision, Visualization, Writing – original draft, Writing – review & editing

thomas.fanshawe@phc.ox.ac.uk

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

Margaret Glogowska

Roles Conceptualization, Formal analysis, Investigation, Writing – original draft, Writing – review & editing

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

George Edwards

Roles Formal analysis, Software, Visualization, Writing – review & editing

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

Philip J. Turner

Roles Conceptualization, Funding acquisition, Investigation, Supervision, Writing – review & editing

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

Ian Smith

Roles Investigation, Resources, Writing – review & editing

Affiliation Oxford University Hospitals NHS Foundation Trust, Oxford, United Kingdom

Rosie Steele

Roles Investigation, Resources, Writing – review & editing

Affiliation Oxford University Hospitals NHS Foundation Trust, Oxford, United Kingdom

Caroline Croxson

Roles Investigation, Writing – review & editing

Affiliation University of Oxford, Oxford, United Kingdom

Jordan S. T. Bowen

Roles Resources, Writing – review & editing

Affiliation Oxford University Hospitals NHS Foundation Trust, Oxford, United Kingdom

Gail N. Hayward

Roles Conceptualization, Funding acquisition, Supervision, Writing – review & editing

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

Competing Interests

The project was supported by a grant from a commercial source (Becton, Dickinson and Company). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. This does not alter our adherence to PLOS One policies on sharing data and materials.