IL12B and rheumatoid arthritis: Although not all of these polymorphisms have been tested directly for association with inflammatory arthritis, results from imputed data from a large genome-wide association study in 1,860 patients with rheumatoid arthritis (RA) and 2,930 population controls did not show any evidence for association with RA for either the IL23R SNPs (for rs11209026, P = 0.18 [directly genotyped by the Wellcome Trust Case Control Consortium]; rs7530511, P = 0.20 [from imputed data]) or the IL12B SNPs (for rs6887695, P = 0.40; for rs3212227, P = 0.79 [both from imputed data]).