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Cytotoxic effect and anti-proliferative activity of LETW on colorectal cancer cells. (a) Dose-dependent effect of LETW on HT-29 cells after 24 h treatment; (b) the cell proliferation of HT-29 cells was significantly inhibited by LETW after 72 h incubation. ** p < 0.01 indicate significant and highly significant differences between the LETW and PEWW treatments, respectively.
