ERAP1 and juvenile idiopathic arthritis: Neither rs30187 in ERAP1 nor rs11209026 in IL23R were significantly associated with the total JIA dataset (P trend = 0.73, OR = 1.03 95% CI 0.92 to 1.14 and P trend = 0.46, OR = 0.93 95% CI 0.78 to 1.12, respectively).