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Flow cytometric evaluation of apoptosis in (A) MCF-7 and (B) MDA-Mb-468 cells using Annexin V and propidium iodide double staining. After 48 hours of treatment, hydroalcoholic Achillea wilhelmsii C. Koch extract resulted in a significant increase in early and late apoptotic cells, in a concentration-dependent manner. Results: mean ± SD 3 independent experiments. Error bars represent standard deviation. *P < .05 and **P < .01 compared with control.
