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Effect of extracts from HDSB on the proliferation of LLC cells and normal lung epithelial cells. The MTT assay was carried out on LLC or BEAS-2B cells treated with different extracts or HDSB11. Values are the mean ± SD of three replicate experiments. Compared with the control group, ∗P < 0.05 and ∗∗P < 0.01.
