TLR7 and Oral ulcer: Also, TLR7-rs3853839 genotype CG and wild model were associated with oral ulcer (CC vs CG, P = 0.01, OR 0.25, 95% CI 0.09–0.74 and CC vs CG + GG, P = 0.04, OR 3.15, 95% CI 1.09–9.13).