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Restraint stress-induced defecation. The number of formless stool and the total number of defecation during 1 h restraint stress in the 7 days PIC group were significantly larger than the corresponding values in control rats. (aP < 0.05 restrained vs. unrestrained in control; bP < 0.01; cP < 0.05 restrained vs. unrestrained in 7 days PIC group; dP < 0.01; eP < 0.05 restrained 7 days PIC group vs. restrained control group; fP < 0.01).
