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. 2014 Jan 2;2:1. doi: 10.1186/2050-5736-2-1

Figure 5.

Figure 5

Change in proliferation of MC3T3-E1 cells ultrasound exposure period. Change in proliferation of ultrasound-stimulated MC3T3-E1 cells (normalized with control) at different ultrasound exposure periods of 5, 10, 20, and 30 min with ultrasound intensity = 75 mW/cm2 (SATA), frequency = 1.5 MHz, PRF = 1 kHz, and pulse duration = 200 μs. Values significantly different from control group have been indicated by filled star for p < 0.05.