About the Authors

Jonathan A. Cook

j.a.cook@abdn.ac.uk

Affiliation Health Services Research Unit, University of Aberdeen, Aberdeen, United Kingdom

Craig R. Ramsay

Affiliation Health Services Research Unit, University of Aberdeen, Aberdeen, United Kingdom

Andrew J. Carr

Affiliation Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Science, and the National Institute for Health Research Biomedical Research Unit, University of Oxford, Oxford, United Kingdom

Jonathan L. Rees

Affiliation Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Science, and the National Institute for Health Research Biomedical Research Unit, University of Oxford, Oxford, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JAC CRR AJC JLR. Performed the experiments: JAC JLR. Analyzed the data: JAC CRR. Contributed reagents/materials/analysis tools: JAC CRR JLR. Wrote the paper: JAC CRR AJC JLR.