FIBP and psoriasis: Another GWAS SNP rs568617, associated with Psoriasis and Crohn’s disease, resided in intron of the gene FIBP next to CTSW and was in high LD with the CTSW promoter SNP rs658524 (r2 = 0.99 to rs658524; r2 = 0.19 to rs3903072; Figure 1A).