HLA-DRB1 and pemphigus: The negative associations were less pronounced, and after exclusion of pemphigus (Figs. S30, S32, S34, S40, S43), only HLA-DRB1*13 (Fig. S4) was found at reduced frequency (genotype: OR 0.41; 95% CI 0.28–0.61; p < 0.00001, allele: OR: 0.49, 95% CI 0.20–1.21, p = 0.12).