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. 2020 Sep 29;6(3):e001402. doi: 10.1136/rmdopen-2020-001402

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© Author(s) (or their employer(s)) 2020. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

This is an open access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited, appropriate credit is given, any changes made indicated, and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/.

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ORs of ever regular smoking and interaction effects with HLA-DRB1 alleles in patients with pSS with Ro/SSA and/or La/SSB autoantibodies compared to controls. The reference group consists of never-smokers and non-carriers of the investigated HLAs; HLA, human leucocyte antigen; pSS, primary Sjögren’s syndrome.