Recent genome-wide association studies in SLE have identified several novel associated locus including E26 transformation-specific-1 (ETS1) rs1128334 G/A and WDFY family member 4 (WDFY4) rs7097397 A/G polymorphisms, which have not been investigated in RA [6]. This evidence concerns the gene WDFY4 and systemic lupus erythematosus.