In our study, we analyzed the joint influence of the FCGR2A rs1801274-G (FCGR2A-p.131Arg) and FCGR3A rs396991-A (FCGR3A-p.158Phe) low-affinity alleles on the effectiveness of ABA in patients diagnosed with RA, since BTs, as we have already described, can be affected by both these SNPs. This evidence concerns the gene FCGR3A and rheumatoid arthritis.