For other polymorphisms, strong associations with RA were demonstrated, namely for a single nucleotide polymorphism (SNP) in the STAT4 gene, for two independent alleles at chromosome 6q23 near OLIG3 and TNFAIP3 genes, and for SNPs near TRAF1 and C5 genes [5-9]. Here, OLIG3 is linked to rheumatoid arthritis.