Data are expressed as means ± SEM. Multigroup comparisons were carried out by Kruskal–Wallis tests, and Mann–Whitney (for 2 groups). Statistical comparisons for Oil Red O TUNEL, BrdU, Ki67, PECAM-1, Wt1, Calponin and α -SMA etc. staining on heart cryosections were performed using the unpaired Student t test and ANOVA. P < 0.05 was considered statistically significant for all tests.
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