More recently, p63-expressing cells in the bronchiolar epithelium have been Abbreviations: BADJ, bronchoalveolar duct junction; BASC, bronchoalveolar stem cell; BrdU, 5-bromo-2 0 -deoxyuridine; CCSP, Clara cell secretory protein; Clara V , variant Clara; EpCAMhi, epithelial cell adhesion molecule Fgf10, fibroblast growth factor 10; NEBs, neuroendocrine bodies; Oct-4, octamer-binding transcription factor 4; PSMC, parabronchial smooth muscle cell; Sca-1, stem cell antigen 1; SMG, submucosal gland; SP-C, surfactant protein C; SSEA-1, stage-specific embryonic antigen-1; SARS-CoV, severe acute respiratory syndrome coronavirus.