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Handling editor Josef S Smolen
Twitter @RajAmarr, @MikeEhrenstein
Contributors MRAS, S-AY and MRE were involved in the design of the study and data interpretation, and wrote the manuscript. RA and MDM collected the data. MRAS analysed the data. All authors reviewed and approved the manuscript’s content before submission.
Funding MRAS is funded by vs Arthritis. S-AY is funded by the Royal College of Physicians, Rosetrees Trust, NIHR University College London Hospitals (UCLH) Biomedical Research Centre, UCLH Charities and Versus Arthritis. MRE is supported (in part) by the UCLH Biomedical Research Centre.
Competing interests None declared.
Provenance and peer review Not commissioned; externally peer reviewed.
Supplemental material This content has been supplied by the author(s). It has not been vetted by BMJ Publishing Group Limited (BMJ) and may not have been peer-reviewed. Any opinions or recommendations discussed are solely those of the author(s) and are not endorsed by BMJ. BMJ disclaims all liability and responsibility arising from any reliance placed on the content. Where the content includes any translated material, BMJ does not warrant the accuracy and reliability of the translations (including but not limited to local regulations, clinical guidelines, terminology, drug names and drug dosages), and is not responsible for any error and/or omissions arising from translation and adaptation or otherwise.