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Effect of WI-38, BJ and CCD-18Co cells on colon cancer cells. (A) 2D growth morphology of SW480 cells. (B) Cell proliferation determined by Abs and (C) apoptotic ratio of SW480, Caco-2, HT-29 and DLD-1 cells. Error bars represent the standard deviation of three replicates. *P<0.05, as indicated. Scale bars, 50 µm. Abs, absorbance.
