We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleLonging for Ligand: Hedgehog, Patched, and Cell Death.AuthorsGuerrero, Isabel; Altaba, Ariel Ruiz iPublicationScience, 2003, Vol 301, Issue 5634, p774ISSN0036-8075Publication typearticleDOI10.1126/science.1088625