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Toxicity of plant extracts to SH-SY5Y neuroblastoma cells. Cultured SH-SY5Y cells were exposed to plant extracts over a concentration range of 156–2500 µg/mL and for 48 h. Toxicity was evaluated by a MTT assay. Histograms represent cell viability as means ± SEM for an n-number of 4; ns = nonsignificant differences from control values.
