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Morphometric analysis of cell proliferation in tracheal epithelium after chlorine injury. Cell proliferation was assessed in EdU-stained tracheal sections as described in Materials and Methods. The graphs depict the volume density (Vv) of EdU-labeled nuclei (nEdU) relative to total nuclei in tracheal epithelium (nTotal). a, p < 0.05 vs. unexposed; b, p < 0.05 vs. proximal.
