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Immunohistochemical analysis of CD31, VEGF and HIF-1α expression in each group 8 weeks post-operation. There were nearly no positive staining for CD31, VEGF and HIF-1α found in β-TCP Group, a few of positive staining observed in hiPSC-MSCs Group, and more positive staining in DMOG-hiPSC-MSCs and DMOG-hiPSC-MSCs-LY294002 Groups. Scale bar: 150 μm.
