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3. Manifestation of the limb prepattern: limb development in the absence of sonic hedgehog function. Chiang C, Litingtung Y, Harris MP, Simandl BK, Li Y, Beachy PA, Fallon JF. Dev Biol; 2001 Aug 15; 236(2):421-35. PubMed ID: 11476582 [Abstract] [Full Text] [Related]