These locus rs705708 (on chr12), rs706778 (on chr10), rs6669008 (on chr1), rs1788103 (on chr18) and rs9976767(on chr21) are mapped to ERBB3, IL2RA, MAGI3, CD226 and UBASH3A which are associated with RA and T1D. This evidence concerns the gene MAGI3 and rheumatoid arthritis.