ATIC and rheumatoid arthritis: Four of the studied SNPs were protective against RA—namely, ATIC rs3821353 (in its codominant and recessive models), ATIC rs4673990 (in its recessive model), SLC19A1 rs11702425 (in its dominant C/T and codominant T/T models), and GGH rs12681874 (in its dominant, codominant, and over-dominant models)—while only two SNPs were predictive of increase in RA risk: ATIC rs3821353 (in its over-dominant model), and ATIC rs4673990 (in its codominant and over-dominant models).