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Effect of propofol on CRL-7566 cell proliferation. CRL-7566 cells were treated with various concentrations of propofol (0, 1, 5 or 10 µg/ml) for 24, 48 or 72 h. The cell viability of cells from different groups was then assessed by an MTT assay. Values are expressed as the mean ± standard deviation. *P<0.05, **P<0.01 vs. control group.
