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(A) Brightfield images of Matrigel tube formation assay. HUVECs cultured in conditioned media (CM) from Bcl-2-DPSCs under hypoxia formed a vascular network similar to that cultured in endothelial cell medium (ECM). (B) Quantification of length and number of vascular tubes formed by HUVECs. * p < 0.05, ** p < 0.01, versus the corresponding controls.
