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Cytotoxicity of P123-polyethylenimine (PEI)-R13 at various concentrations in B16 cell lines using the 3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyl tetrazolium bromide assay.
Notes: Each data point represents the mean ± standard deviation; n = 6, **P < 0.01.
