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Viability of HepG2 cells exposed for 72 h to a concentration range of cisplatin (0.3 to 30 µg/mL), used here as a toxic positive control, or of hydroethanolic extracts (1 to 200 µg/mL) obtained from M. aquatica, L. dentata and L. cardiaca. Values are means ± SD of the percentage of cell viability with respect to control untreated cells.
