PPP5C and Oral ulcer: For example, rs7749390 an intronic variant in the IFNGR1 gene (Table 2, Fig. 2d) and rs3764613 within PPP5C (Table 2, Fig. 2e), showed very strong evidence for associations with mouth ulcers (OR 1.08, 95% CI: 1.07, 1.08; EAF 0.61; P = 2.0e−62 and OR 0.93, 95% CI: 0.92, 0.93; EAF 0.43; P = 7.4e−73, respectively).