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MTT analysis of MeHg-treated astrocytes and microglia. The effects of MeHg cytotoxicity were measured with the MTT assay after MeHg treatment for 6 hr. Values are expressed as the mean ± SEM derived from three independent experiments. ★ P<0.05, ★ ★ P<0.01, ★ ★ ★ P<0.001
