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Fig. 6 Indomethacin exposure induces myocardial apoptosis in zebrafish embryos. (A) Representative fluorescence images of the apoptotic phenotype of zebrafish treated with indomethacin at different concentrations after 72 and 96 h of exposure. The white dotted circles represent pericardial areas, and the asterisks represent apoptotic cells. Scale bar, 200 µm. (B) Quantification of fluorescent intensities in the pericardial areas of zebrafish embryos treated with indomethacin at different concentrations after 72 and 96 h of exposure (n = 9 for each group). All the values are presented as the means ± SEM. **P < 0.01, ***P < 0.001, ****P < 0.0001.