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Does the season at symptom onset influence the long-term severity of radiographic joint destruction in rheumatoid arthritis?

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  • Contributors AvdHM, TWJH and BS collected the data. DPCdR, BS and MLEA performed the statistical analyses. DPCdR wrote the first version of the manuscript. All authors reviewed and approved the manuscript.

  • Competing interests None.

  • Ethics approval This study was approved by the local medical ethics committees of both cohorts (Leiden EAC and BARFOT).

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

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