Fig4I. from [doi:10.1101/gad.1190304] Genes Dev 2004 18(8): 937-51, Jeong J; Mao J; Tenzen T; Kottmann AH; McMahon AP, Hedgehog signaling in the neural crest cells regulates the patterning and growth of facial primordia. Copyright 2004 [PMID:15107405]