Assertion: platelet's growth factor | /r/HasProperty | beta- 1
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Source sentences:
text: The seven known growth factors in PRP are: platelet derived growth factor aa (PDGFaa), PDGFbb, PDGFab, transforming growth factor beta- 1 (TGF-b 1 ), TGF-b 2 , vascular endothelial growth factor (VEGF), and epithelial growth factor (EGF).