About the Authors

Sarah K. Taylor

Roles Conceptualization, Formal analysis, Investigation, Methodology, Writing – original draft

Affiliation University of Sheffield, Sheffield, United Kingdom

John C. Andrzejowski

Roles Conceptualization, Investigation, Methodology, Project administration, Supervision, Writing – review & editing

john.andrzejowski@sth.nhs.uk

Affiliation Department of Anaesthesia, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, United Kingdom

Matthew D. Wiles

Roles Conceptualization, Formal analysis, Methodology, Writing – review & editing

Affiliation Department of Anaesthesia, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, United Kingdom

Sarah Bland

Roles Conceptualization, Methodology, Supervision

Affiliation Pre-operative Assessment, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, United Kingdom

Georgina L. Jones

Roles Methodology, Supervision, Writing – review & editing

Affiliation Leeds Beckett University, Leeds, United Kingdom

Stephen C. Radley

Roles Conceptualization, Methodology, Resources, Supervision, Writing – review & editing

Affiliation Department of Obstetrics and Gynaecology, Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, United Kingdom

Competing Interests

I have read the journal's policy and the authors of this manuscript have the following competing interests: Stephen Radley is a Director and shareholder in ePAQ Systems Ltd, a National Health Service (NHS) spin-out technology company, with Sheffield Teaching Hospitals NHS Foundation Trust being the majority shareholder does not alter our adherence to PLOS ONE policies on sharing data and materials.