HLA-DRB1 and rheumatoid arthritis: Significant RA association were observed with –DRB1 alleles *0101, *0404, *0405 and *0410, compared with healthy controls (Table 1, P = 1.00×10−3, 0.049, 1.35×10−6 and 3.82×10−4, respectively), which was in concordance with the results from other Asian populations [4].