About the Authors

Nisaharan Srikandarajah

Roles Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Project administration, Resources, Validation, Writing – original draft, Writing – review & editing

nishsri09@gmail.com

Affiliation Institute of Translational Medicine, University of Liverpool, Liverpool, Merseyside, United Kingdom

Adam Noble

Roles Data curation, Formal analysis, Methodology, Supervision, Validation, Writing – review & editing

Affiliation Department of Health Services Research, Institute of Population Health Sciences, University of Liverpool, Liverpool, Merseyside, United Kingdom

Simon Clark

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

Affiliation Department of Spinal Surgery, The Walton Centre NHS Foundation Trust, Liverpool, Merseyside, United Kingdom

Martin Wilby

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

Affiliation Department of Spinal Surgery, The Walton Centre NHS Foundation Trust, Liverpool, Merseyside, United Kingdom

Brian J. C. Freeman

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

Affiliation Department of Spinal Surgery, Royal Adelaide Hospital, University of Adelaide, Adelaide, Australia

Michael G. Fehlings

Roles Formal analysis, Methodology, Supervision, Validation, Writing – review & editing

Affiliation Division of Neurosurgery and Spine Program, Toronto Western Hospital, University Health Network, University of Toronto, Toronto, Ontario, Canada

Paula R. Williamson

Roles Conceptualization, Formal analysis, Methodology, Software, Supervision, Validation, Visualization, Writing – review & editing

Affiliation MRC North West Hub for Trials Methodology Research, Institute of Translational Medicine, University of Liverpool, Liverpool, Merseyside, United Kingdom

Tony Marson

Roles Conceptualization, Formal analysis, Methodology, Project administration, Supervision, Validation, Visualization, Writing – review & editing

Affiliation Institute of Translational Medicine, University of Liverpool, Liverpool, Merseyside, United Kingdom

Competing Interests

Coloplast Limited is a funder of this study. There are no patents, products in development or marketed products to declare. This funding does not alter our adherence to PLOS ONE policies on sharing data and materials.