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IP address: 44.205.5.65
Time: 2024-03-29T02:25:51Z
URL: http://scholar.google.com/scholar_lookup?title=Placenta+growth+factor+and+vascular+endothelial+growth+factor+are+co-expressed+during+early+embryonic+development&year=1997&author=Achen&journal=Growth+Factors&volume=15&issue=1&pages=69-80&doi=10.3109%2F08977199709002113&pmid=9401819