Footnotes

• Handling editor Josef S Smolen

• Contributors All authors contributed to the conception and study design. MV contributed to acquisition of the data and analysed the data. All authors contributed to interpretation of the data and the development of the manuscript. All authors approved the final version of the manuscript.

• Funding The research leading to these results has received funding from the Dutch Arthritis Foundation and the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (starting grant, agreement No 714312).

• Disclaimer The funding source had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; or decision to submit the manuscript for publication.

• Competing interests None declared.

• Provenance and peer review Not commissioned; externally peer reviewed.

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