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. 2023 Oct 24;28(6):921–933. doi: 10.1007/s12192-023-01386-1

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© The Author(s) 2023

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Fig. 2 — Transmission electron microscopy of the myocardium demonstrates that the mitochondria were severely affected by the chronic HH exposure. a Representative TEM images of the P, P-EGCG50, HH, HH-EGCG25, HH-EGCG50, and HH-Sal50 groups. b, c Semi-quantitative analysis of mitochondrial damage in each group. ***P < 0.001 compared with the P group; ###P < 0.001 compared with the HH group