IL23R and inflammatory bowel disease: To assess the contribution of IL-23R SNPs to IBD susceptibility, we targeted three nonsynonymous SNPs: rs11209026 (c.1142G>A, p.Arg381Gln), rs41313262 (c.1084 G>A p.Val362Ile) and rs11465797 (c.524 C>A, p.Thr175Asn).