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Increased circulating levels of interleukin 33 in systemic sclerosis correlate with early disease stage and microvascular involvement

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  • Funding This study has been supported by grants from the University of Florence (Progetti di Ricerca di Ateneo, ex 60% to L. Ibba-Manneschi and M. Matucci-Cerinic).

  • Competing interests None.

  • Patient consent Obtained.

  • Ethics approval The study was approved by the Institutional Review Board. All subjects gave written informed consent.

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