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Effect of EMD on the viability of PDLSCs. (A-B) The viability of PDLSCs was determined by CCK-8 assay after the cells were treated with various concentrations (0, 5, 15, 30, 60, 90 and 120 µg/ml) of EMD for 24 h or with 30 and 60 µg/ml of EMD for 24, 48 and 72 h. Values of changes caused by EMD treatment in the viability of PDLSCs were normalized to the control, and the representative results from 3 independent experiments are shown. *P < 0.05 vs. the control.
