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Total amount of ceramides in the keratinocytes (A) and fibroblasts (C) and relative content of each ceramide class in the keratinocytes (B) and fibroblasts (D) of healthy subjects and patients with psoriasis vulgaris (Ps); (values are mean ± SD *** p < 0.001; ** p < 0.01); (non-hydroxy fatty acid [N], α-hydroxy fatty acid [A], and esterified ω-hydroxy fatty acid [EO], dihydrosphingosine [DS], sphingosine [S], and phytosphingosine [P], internal standard [ISTD]).
