HLA-DRB1 and uveitis: Association testing of all genetic markers in the cohort identified amino acid position 11 of HLA‐DRB1 (P = 1.6 × 10−35) as the most significantly associated marker (Figure 1A), where serine was associated with increased risk of uveitis (OR 2.2, 95% confidence interval [95%] CI 1.9–2.5).