Affiliation: | 1. Program in Epithelial Biology, Stanford University, Stanford, CA 94305, USA;2. Program in Cancer Biology, Stanford University, Stanford, CA 94305, USA;3. The Eli and Edythe Broad Center for Regeneration Medicine and Stem Cell Research, University of California, San Francisco, San Francisco, CA 94131, USA;4. VA Palo Alto Healthcare System, Palo Alto, CA 94304, USA |