Numerous SNPs within the ERAP1 gene have been analyzed in the context of predisposition to psoriasis, but the strongest association with the disease in a European population has been proved for rs26653 (P = 0.00006) [23] and was confirmed by Tang et al. in Chinese patients (P = 5.27×10−12) [24]. The gene discussed is ERAP1; the disease is psoriasis.