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The cell viability of HepG2, SMMC-7721, and HL-7702 cells coincubated with 0–800 µM of Sa and 5 µM DDP for (a) 24 h, (b) 48 h, and (c) 72 h. All results were exhibited as the means ± SD of five different samples. a–f, A–G,a–fBars with different superscript letters differ significantly (P < 0.05) by Duncan's multiple range test.
