Fig. 1

The individual as well as mean (± SEM) frequency of HTR induced by d-fenfluramine (5 mg/kg, i.p.) across different ages (20-, 30- and 60-day old) in mice. Significant differences occurring between 20- and 30-day (****p < 0.0001) and between 30- and 60-day old mice (****p < 0.0001). One-way ANOVA followed by Tukey's test. n = 10 in each age group. Data are presented as means ± SEM