Sox2 Is Required for Maintenance and Differentiation of Bronchiolar Clara, Ciliated, and Goblet Cells Tompkins, David H. ; Besnard, Valérie ; Lange, Alexander W. ; Wert, Susan E. ; Keiser, Angela R. ; Smith, April N. ; Lang, Richard ; Whitsett, Jeffrey A. Abstract Publication: PLoS ONE Pub Date: December 2009 DOI: 10.1371/journal.pone.0008248 Bibcode: 2009PLoSO...4.8248T