The presence of antibodies to the collagen-related antigens CitI (OR 2.8; P = 0.043), CitII (OR 3.6; P = 0.016) and HcitII (OR 5.2; P = 0.042) reached close to statistically significant association with erosive RA, whereas for antibodies against HcitI (OR 2.4; P = 0.171) the association did not reach statistical significance.
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Separate and overlapping specificities in rheumatoid arthritis antibodies binding to citrulline- and homocitrulline-containing peptides related to type I and II collagen telopeptides.
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