PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 33424378-0 2021 Expression of Vascular Endothelial Growth Factor Using Platelet Rich Fibrin (PRF) and Nanohydroxyapatite (nano-HA) in Treatment of Periodontal Intra-Bony Defects - A Randomized Controlled Trial. nanohydroxyapatite 86-104 vascular endothelial growth factor A Homo sapiens 14-48