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The cytotoxicity of the methanol extract of the leaves of Achilea biebersteinii on the proliferation of human foreskin fibroblast cells (HFF3). The cells were treated with various concentrations (1-512 µg/ml) of the extract in a culture medium for 24, 48 and 72 h. Cells viability was determined and compared with the control (untreated cells) by the MTT assay. Each value represents the mean ± SD (n=3). *p<0.05 Starred values, are significantly different from other means
