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Viability of RF/6A cells was not influenced by AuNPs. The cells were treated with different concentrations of AuNPs for 24 h after being starved for 24 h. Cell viability was determined by the 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. The results are expressed as a percentage of control and represent the mean ± standard errors (SE) of four independent experiments.
