Statistical analysis
The normality of data was analyzed using a D'Agostino and Pearson
omnibus normality test. Data from behavioral tests, [3H]5-HT uptake, serum ACTH and corticosterone levels were analyzed using unpaired Student's t test. Data from the total occurrence of vocalizations and
urine in the LAM were analyzed by Fisher's exact test. Descriptive statistics
data were expressed as the mean(s) ± SEM. Probability values less than 0.05 (p b 0.05) were considered as statistically significant. All analyses were performed using the GraphPad software (GraphPad software,
San Diego, CA, USA)