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OGE diminished cell viability of A549 cell. The cell viability of A549 cells (a) and BEAS-2B cells (b) treated with serial concentrations of OGE (10, 50, 100, 200 and 300 μg/ml) for 48 h was determined. Data were expressed as mean ± SEM for 3 independent experiments. *P < .05 and, **P < .01 as comparing to control (c). n.s., no statistical significance.
