CD79A and systemic sclerosis: No association between anti-CarP IgG levels and mRSS in the SSc patients was found (r = 0.141, p = 0.049), nor for anti-CarP IgM levels (r = 0.026, p = 0.721) or for anti-CarP IgA levels (r = 0.057, p = 0.426; Fig. 3a).