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Representative histological images of the paw pad, stained with hematoxylin-eosin stain (a, b), Verhoeff-van Gieson stain (c, d), and Sirius red stain (e, f). Scale bars in the images (a–f) represent 200 μm, 200 μm, 100 μm, 500 μm, 100 μm, and 500 μm, respectively.
