Fig. 5From: Methylxanthines induce structural and functional alterations of the cardiac system in zebrafish embryosHeart rate of zebrafish embryos at 48 hpf. Ten normal embryos were randomly selected for each concentration of each drug for counting the heart beat. One way ANOVA with Dunnett’s test was used to test the significance of the data. Asterisks indicate that the p-value differ significantly from control. *** = p < 0.0005; ** = p < 0.005; * = p < 0.05Back to article page