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Effects of glycyrrhizin on viability of ARPE‐19 cells in vitro. A, methylthiazolyldiphenyl‐tetrazolium bromide (MTT) assay showed that glycyrrhizin had no toxic effects on ARPE‐19 cells at concentrations of 25‐200 μmol. B, MTT assay showed that glycyrrhizin at a concentration of 25‐100 μmol significantly increased the viability of ARPE‐19 cells treated with sodium iodate, compared with sodium iodate control (*P < 0.01).
