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Boxplots showing levels of antibodies to ac-lysine, ac-lysine.inv, and ac-ornithine according to number of AAPA reactivities separately for CTD (connective tissues diseases), SpA, HC, eRA, and estRA.
AAPA, anti-acetylated peptide antibodies; CTD, connective tissue diseases; eRA, early RA; estRA, established RA; HC, healthy controls; RA, rheumatoid arthritis; SpA, spondyloarthritis.
