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Effect of PFEE on colony formation of HeLa cells in vitro. (a) Showed dose dependent inhibition of clonogenicity in HeLa cell. (b) Showed bar graph of percentage of colonies (Y axis) against concentration of PFEE (X axis). Data are representative of three independent experiments and bar graph shows mean ± SEM (**P < 0.05, ***P < 0.001, ns not significant)
