LYZ and rheumatoid arthritis: We found a significant positive correlation between lysozyme and EndoCAb IgG (r = 0.301, P = 0.033 in RA subjects; r = 0.329, P = 0.021 in healthy controls) and EndoCAb IgA (r = 0.291, P = 0.040 in RA subjects; r = 0.420.