MIF and rheumatoid arthritis: In terms of haplotypes, in the RA population as well as in the controls we observed three predominant haplotypes (−794CATT5‐8/ −173G > C MIF): 5G (RA 13.5% vs. CS 11.2%), 6G (RA 46.5% vs. CS 50%), and 7C (RA 37.7% vs. CS 35.5%); the remainder of the haplotypes had very low frequencies (<1%) in both study groups.