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. 2020 Oct 13;203(1):32–40. doi: 10.1111/cei.13521

Fig. 2.

Fig. 2

Relationship between anti‐measles immunoglobulin (Ig)G and anti‐citrate synthase (CS) IgG natural autoantibody titers [in systemic sclerosis (SSc), systemic lupus erythematosus (SLE) and rheumatoid arthritis (RA) disease groups (n RA = 73; n SLE = 92; n SSc = 157]. Qualitative (positive, negative) anti‐measles IgG results were compared to quantitative anti‐CS IgG results (expressed in arbitrary units, based on our in‐house standard), using Mann–Whitney U analysis. Significantly higher levels of natural anti‐CS IgG were detected in anti‐measles IgG‐seropositive compared to seronegative samples in RA, SLE and SSc. Boxes show interquartile ranges (IQR); whiskers indicate lowest and highest values; horizontal lines represent medians.