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Plasma corticosterone (CORT) levels at baseline and 20 minutes after the initiation of restraint stress in control or chronic variable stress (CVS)-treated pair- versus single-housed male mice. Each bar represents mean ± SEM, and numbers within each bar indicate the number of animals used for each group. ***=p<0.001 for restrained single-housed CVS-treated versus restrained single-housed control animals.
