NEFL and psoriasis: As for laboratory parameters after the division according to the duration of the disease, we found negative correlations between NFL concentrations and RBC in the group of short-lasting psoriasis (R = −0.357, p < 0.05) and triglycerides in the group of long-time psoriatics (R = −0.486, p = 0.018) (Figure S2 in Supplementary Files).