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Time: 2024-03-28T10:40:32Z
URL: http://scholar.google.com/scholar_lookup?title=The+hypoblast+of+the+chick+embryo+positions+the+primitive+streak+by+antagonizing+nodal+signaling.&year=2002&author=Bertocchini&journal=Dev.+Cell.&volume=3&pages=735-744&pmid=12431379