highly significantp < 0.0001
In the present study a two-way analysis of ANOVA (age × treatment) showed highly significant differences of age ( F 2, 78 = 43.43, p < 0.0001), treatment ( F 3, 78 = 61.01, p < 0.0001), and age × treatment interaction ( F 6, 78 = 8.706, p < 0.0001; Fig. 5 ).