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The volume density of epithelial cells. (A,B) Images of two stereological unbiased counting frames (stained with hematoxylin and eosin); (C) the number of epithelial cells per counting frame in different segments per rat; (D) the number of epithelial cells per counting frame in different segments from all rats; (E) average of epithelial cells from all counting frames per rat. A significant difference was observed among rats. *, P<0.05.
