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Effect of different extracts from UW on cell viability of HK2 cells. The cells were treated with the indicated concentrations of UWP (a), UWE (b), UWB (c), and UWA (d) for 24 h. Cell viability was determined by the SRB assay. Values are expressed as mean ± SD from three independent replicates. ∗P < 0.05 compared with the control group.
