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The result of the CCK-8. The cell proliferation rate of the osteosarcoma cells in the 0-hour stretch group, 2-hour stretch group, 12-hour stretch group, 24-hour stretch group, and the 48-hour stretch group. The results are presented as the means ±SD, n=3; ns means p>0.05 versus the control group; * p<0.05 versus the control group; ** p<0.01 versus the control group; one-way ANOVA.
