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Production of (A) IL-6 and (B) IL-8 to cultivation media measured by enzyme-linked immunosorbent assay (ELISA) compared with detection of (C) IL-6 and (D) IL-8 gene activity. Potential statistical significance between tested types of fibroblasts was marked by use of line segments connecting tested cell types; *p<0.05 and **p<0.05 indicates a statistically significant difference and a minimum of a 2-fold (δ>2) change. IL, interleukin.
