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Cytotoxic effect of Pb(NO3)2 to HL-60 cells. HL-60 cells were cultured in the absence or presence of Pb(NO3)2 for 24 h. Cell viability was determined based on the propidium iodide assay. Each point represents a mean value of 3 experiments with 6 replicates per concentration. p < 0.05 versus compared with control group. * Significantly different (p < 0.05) from the control, according to the Dunnett’s test.
