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Viability of HaCaT cells pre- or post-treated with (a) mastic essential oil, (b) myrcene, or (c) α-pinene under conditions of UVB exposure. Representative figures of at least three experiments. Results are shown as the mean ± SD. Note: * p < 0.05, ** p < 0.01, *** p < 0.001 vs. UVB-treated cells, ### p < 0.001 vs. control (untreated cells).
