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Guo J, Zhang T, Cao H, et al. Sequencing of the MHC region defines HLA-DQA1 as the major genetic risk for seropositive rheumatoid arthritis in Han Chinese population. Ann Rheum Dis 2019;78:773–80. doi: 10.1136/annrheumdis-2018-214725.
In the text, all DRβ1:96 hours should be DRβ1:96H.
The sentence on page 775, “followed by DQα1:160A (p=6.25×10−17, OR=2.27, 95% CI 1.87 to 2.75)” should be “followed by DQα1:160A (p=6.25×10−17, OR=0.44, 95% CI 0.36 to 0.53)”.
The sentences on page 776,
“DRβ1:96 hours also showed a significant association (p=6.27×10−7, OR=1.59, 95% CI 1.33 to 1.91)” should be “DRβ1:96H also showed a significant association (p=6.27×10−7, OR=0.64, 95% CI 0.53 to 0.77)”.
“Although DRβ1:96 hours became the second independent signal (p=2.80×10−10, OR=1.68, 95% CI 1.43 to 1.97)” should be “although DRβ1:96H became the second independent signal (p=2.80×10−10, OR=0.58, 95% CI 0.49 to 0.68)”.
“DRβ1:96 hours and DRβ1:37N showed similar independent effects (DRβ1:96 hours: p=4.90×10−16, OR=1.64, 95% CI 1.45 to 1.84…” should be “DRβ1:96H and DRβ1:37N showed similar independent effects (DRβ1:96H: p=4.90×10−16, OR=0.60, 95% CI 0.54 to 0.68…”.
Figure 3 has been corrected. In the revised figure 3, the frequencies on Y axis have been presented according to original frequencies instead of the minor frequencies.
Supplementary tables 3–6 and 8 have been corrected. In these tables, a few frequencies have now been presented as original frequencies instead of the minor frequencies and the ORs have been revised accordingly.