^aStatistically significant difference with NC group at the level P < 0.05 (One-way ANOVA, Tukey’s post-hoc test).
^bStatistically significant difference between the groups at the level P < 0.05 (One-way ANOVA, Tukey’s post-hoc test).
NC = negative control (no cytotoxicity, 100% viability); PC = positive control (cytotoxicity, viability ≤ 10%).