About the Authors

Ross Wilkie

r.wilkie@keele.ac.uk

Affiliation Arthritis Research UK Primary Care Centre, Primary Care Sciences, Keele University, Keele, Staffordshire, United Kingdom

Abdelouahid Tajar

Affiliation Centre for Statistics in Medicine, University of Oxford, Oxford, United Kingdom

John McBeth

Affiliation Arthritis Research UK Primary Care Centre, Primary Care Sciences, Keele University, Keele, Staffordshire, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: RW AT JM. Performed the experiments: RW AT JM. Analyzed the data: RW AT JM. Contributed reagents/materials/analysis tools: RW AT JM. Wrote the paper: RW AT JM.