TNFAIP3 and psoriasis: At least 36 different loci have been identified as susceptibility loci of psoriasis by GWAS [5], including the TNIP1 gene, which encodes TNF-α–induced protein 3-interacting protein 1 (TNIP1), as well as the tumor necrosis factor α-induced protein 3 (TNFAIP3) gene, which encodes protein A20 [6, 7].