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The effect of hydroquinone (HQ 10–500 μM; 18 h) on the release of IL-1β (A) and IL-18 (B) from IL-1α-primed ARPE-19 cells. Data were combined from three independent experiments with four parallel samples per group in each experiment. Results are shown as mean ± SEM. * p < 0.05, *** p < 0.001, **** p < 0.0001, ns—not significant, Mann-Whitney U-test. [Kruskal-Wallis test, (A) ns p = 0.903, (B) *** p < 0.001].
