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. 2024 Feb 10;24(2):199–208. doi: 10.1007/s12012-024-09835-8

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© The Author(s) 2024

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Fig. 2 — Representative slices of hearts stained with picrosirius red staining. Muscle cells stain yellow while collagen (scar) stains red. A Air-exposed heart with myocardial infarct scar as control; B E-cig-exposed heart with myocardial infarct scar. Note that scar circumference was comparable in the air-exposed heart compared to the E-cig-exposed heart, and the scar thickness and total LV circumference were also comparable between the two groups. (Scale bar = 5 mm)