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Cytotoxic effects of HEXs on leukemic cells. (a) Jurkat cells. (b) K562 cells. Cells (1 × 105/mL) were incubated in the absence (control) or presence of rhizome (HEXs-R) or leaf extracts (HEXs-L) at 50 µg/mL for 48 h. Cytotoxicity was determined by the MTT assay. The results express mean percentage of control ± S.D. of three experiments with triplicates. ∗∗∗ p < 0.001, related to control, by one-way ANOVA followed by Tukey's posttest.
