TLR4 and psoriasis: Furthermore, a recent study mapping cis-acting expression quantitative trait loci (eQTLs) in psoriasis using normal skin from 57 healthy controls, and both involved and uninvolved skin from 53 psoriasis patients did not report any significant associated SNPs tagging TLR4 eQTLs in their analysis (p < 9 × 10−7) [17].