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Effects of toxins on the proliferating cell nuclear antigen labeling index in the mucosal epithelium of the cecum, ascending colon, and descending colon in pigs after six weeks of treatment. (A) Immunopositive cells. (B) Percentage of proliferating cell nuclear antigen (PCNA) positive cells in the cecum, ascending colon, and descending colon. Values presented are means and SEM. For other explanations, see Figure 1.
