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ABR threshold. ABR thresholds were measured with tone burst stimuli at 8 (A, E), 16 (B, E), 32 (C, E), and 48 (D, E) kHz in male and female CBA/CaJ mice at 5, 17, and 24 months of age; 5 m (20, 10 males and 10 females), 17 m (21, 11 males and 10 females), 24 m (19, 10 males and 9 females). Data are shown as means ± SEM. Two-way ANOVA with Bonferroni’s multiple comparisons test was performed. m, months of age; M, male; F, female.
