*4.3. Histology*

Tissue samples were washed in Phosphate Bu ffer Saline (PBS), formalin-fixed, and para ffin-embedded for staining using hematoxylin and eosin (H&E) and Masson's trichrome, in accordance with our previous study [43]. Para ffin blocks were sectioned at 6 microns onto glass slides for brightfield microscopy imaging.
