Multiple studies have henceforth evaluated SNPs mapped in the above genes [109,110], with a pharmacogenetic meta-analysis on European patients confirming the association of common TNF (rs361525, p = 0.003; rs1800629, p = 0.004; rs1799724, p = 0.003) and TNFRSF1B (rs1061622, p = 0.001) alleles and response to anti-TNF therapy in psoriasis [111], while ambiguous results were derived regarding the FCGR3A rs396991 SNP (I2 = 78.9%) [112], a gene responsible for the removal of circulating antigen–antibody complexes. This evidence concerns the gene TNF and psoriasis.