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Increased risk of multiple myeloma in primary Sjögren’s syndrome is limited to individuals with Ro/SSA and La/SSB autoantibodies

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  • Handling editor Josef S Smolen

  • Contributors JM, MW-H and GN conceived the study, with additional support from EB and KES. MK, HF-dE, SM-B, PE, TM and GN extracted register data. JM analysed the data with input from MW-H and GN. JM wrote the first manuscript with input from MW-H, GN and EB. All authors participated in the editing of the manuscript until its final version.

  • Funding The study was supported by grants from the Swedish Research Council, the Swedish Rheumatism Association, the King Gustaf the V's 80-year foundation, the Heart-Lung Foundation, the Freemason’s in Stockholm Foundation for Children’s Welfare, the Stockholm County Council, the Karolinska Institute and the Torsten and Ragnar Söderberg Foundation.

  • Competing interests None declared.

  • Patient consent for publication Not required.

  • Ethics approval The study was approved by the Regional Ethics Committee in Stockholm, and patients gave written informed consent.

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

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