Fig. 7From: Exosomes secreted by endothelial progenitor cells accelerate bone regeneration during distraction osteogenesis by stimulating angiogenesisImmunohistochemical analysis of OCN (a) and CD31 (b) in the distraction zone. c OCN and CD31 images from the sham group. EPCs endothelial progenitor cells, Exo exosomes secreted by EPCs, OCN osteocalcin, PBS phosphate-buffered salineBack to article page