We did not investigate HLA-Cw*06 in UIA patients or HLA-DRB1 in patients with psoriasis as previous studies have excluded a role for these genes in the respective conditions.12, 30–33 Previous studies on patients with psoriasis have shown that both HLA-Cw*06 and HLA-DRB1*07 are associated with type I psoriasis, but not with type II psoriasis.12, 30, 31, 42 We have confirmed that, although both phenotypes show association, the HLA-DRB1*07 result has arisen due to LD with HLA-Cw*06. This evidence concerns the gene HLA-DRB1 and psoriasis.