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Co, Ni, Fe, Mn, Mg, Cu and Zn cytotoxicity in MCF-7 cells. The cells were incubated with 0.25 µM, 0.05 µM, 0.025 µM and 0.0005 µM of metal chlorides for 24 h. Mean values from five independent experiments ± SD are shown. Results are statistically insignificant.
