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Cell viability of human hepatocytes assayed by MTT assay. Data were presented as mean ± SD (*P<0.05; **P<0.01). The significance of I/R group was compared with control group while the significance of propofol group was compared with I/R group. I/R, ischemia-reperfusion; MTT, 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide.
