These results suggest that DR4 is strongly associated with RA in the Han nationality, and the dominant effect that determines susceptibility to RA is associated with QKRAA or QRRAA as well as V85 and G86.

• DR4与我国汉族RA相关； DR抗原中QKRAA或QRRAA同源表位及V85、G86序列可能与RA的发病有关。