TNF and psoriasis: Conversely, in the study by Cabaleiro et al. (n = 161, Spain), the following SNPs were associated with PP development in psoriasis patients under anti-TNF-α: the rs11209026 IL23R, rs10782001 FBXL19, rs3087243 CTLA4, rs651630 SLC2A8, and rs1800453 TAP1 genes [115].