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. 2017 Dec 29;17:555. doi: 10.1186/s12906-017-2063-y

Fig. 7.

Fig. 7

Inhibition of drug-resistant KB cell growth in vitro via the Danshen crude. An assessment of cell proliferation and viability by using the methylene blue assay in six drug-resistant oral cancer cells treated with varying concentrations of the Danshen crude (0–80 μg/mL) or dimethyl sulfoxide (1 μL/mL) for 24 h