HDL-mediated cholesterol efflux capacity was negatively associated with psoriasis area severity index score [30,33], being significantly impaired in patients with higher psoriasis area severity index score [32], while it was positively associated with impaired levels of apoA-I, phosphatidylcholine, sphingomyelin [30], and total phospholipid HDL content [33]. This evidence concerns the gene APOA1 and psoriasis.