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Expression of OCN, OPN, Hes1 and CD31 in fracture samples. (A-B) Immunohistochemical staining of OCN, OPN and Hes1 (day 28). Scale bar = 50 μm. (C) Immunofluorescence staining of α-SMA and CD31 (day 14). Scale bar = 100 μm. (D-F) Quantification of OCN, OPN, Hes1 and CD31 expression. *p < 0.05, **p < 0.01, ***p < 0.001 vs. PBS control; #p < 0.05, ##p < 0.01, ###p < 0.001 vs. GFP-Exo group.
