In a case-control study performed in patients with psoriasis (n = 1050; controls n = 1497), the SNPs rs8016947 (NF-κBIA), rs4649203 (IL28RA), rs12720356 (TYR2), and rs27524 (ERAP1) were not associated with the disease [2]. This evidence concerns the gene ERAP1 and psoriasis.