HLA-DRB1 and rheumatoid arthritis: Notably, rs1748033(T), which belongs to the same RA susceptibility haplotype as rs11203367(T), associated strongly with anti-CCP-positive RA in HLA-DRB1*04-positive individuals (p=0.007; Table 3), with higher cumulative ORs for carriers of this allele compared to non-carriers (Figure 2C, light blue bars vs dark blue bars).