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Protective effects from H2O2-induced oxidative stress. HUVECs viability after 2 h (a) or 24 h (b) of pre-treatment with CE or CHE and treatment with 50 µM H2O2 for 1 h. Data are expressed as the % of viable cells compared to 100% of control (untreated cells). (*p < 0.05, ** p < 0.005, *** p < 0.0005, **** p < 0.0001 vs. H2O2; §§§§ p < 0.0001 vs. control).
