Before revision: Platelet activation in response to tissue damage occurs during the process of making PRF release several biologically active proteins including; platelet alpha granules, platelet‑derived growth factor (PGDF) .
After revision: , transforming growth factors‑β (TGF‑β), vascular endothelial growth factor (VEGF), and epidermal growth factorPlatelet activation in response to tissue damage occurs during the process of making PRF release several biologically active proteins including; platelet alpha granules, platelet‑derived growth factor (PGDF) .