RFC1 and rheumatoid arthritis: In agreement with the results of Chatzikyriakidou et al. [34], we also confirmed that the three patterns in the combination of the RFC1 80 G > A with RFC1−43 T > C genotype had a strong linkage disequilibrium between RFC1 80 G > A and RFC1−43 T > C genotypes in healthy Japanese adults and RA patients.