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IHC analysis of the expression of BMP-2. (a) IHC analysis of BMP-2 expression showed that only a few sites of expression were observed in the control group but were more clearly observed in the other groups. (b) Statistical analysis of the stained area showed a significantly higher BMP-2 expression in the SHEDs and SHEDs + CAP groups but not in the control group or CAP group. n = 5 for each group, ** p < 0.01, * p < 0.05. Scale bars = 500 μm.
