CD79A and rheumatoid arthritis: Notwithstanding the relatively small number of patients, which is a limitation of this study, it is, however, noteworthy that similar sized or smaller cohort studies have been published in a number of peer-reviewed journals as illustrated in the systematic review article by Peter Taylor et al.22 The findings of our study do, however, appear to indicate the lack of superiority of RF-IgA and ACPA-IgA over cRF and ACPA-IgG in the sero-diagnosis of RA.