Assertion: periosteum's progenitor cell | /r/HasProperty | derived
Facets:
value: from vascular endothelial cells
type: OTHER
Source sentences:
text: Follow‐on studies will be necessary to determine whether the collagen membrane per se adsorbs or sequesters factors conducive to ectopic bone formation far from, and external to, the implant (e.g., ectopic bone formation in muscle via BMP‐mediated pathways  or “muscle‐resident mesenchymal progenitor cells, which may be derived from vascular endothelial cells” ).