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Comparison cytotoxic effect of galangal extract on cell viability of MCF-7 and MRC-5 cells. Cells were treated with different concentrations of the extract for 24 h (A), 48 h (B) and 72 h (C), results are mean ± SEM(n = 6). *p < 0.05, **p < 0.01 and ***p < 0.001 compared to control (MRC-5).
