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Time: 2024-03-28T14:41:55Z
URL: http://scholar.google.com/scholar_lookup?title=Retinoid+signaling+is+required+for+the+establishment+of+a+ZPA+and+for+the+expression+of+Hoxb-8%2C+a+mediator+of+ZPA+formation.&year=1997&author=Lu&journal=Development.&volume=124&issue=9&pages=1643-1651&pmid=9165113