IL2RA and rheumatoid arthritis: In addition, the haplotypes “Crs12569923Grs791588” and “Crs12569923Trs791588” of IL2RA was associated with an increased risk of RA adjusted by age and gender (OR = 1.35, 95% CI: 1.12–1.64, p = 0.0016; OR = 1.24, 95% CI: 1.03–1.48, p = 0.021).