2.13. Histological analysis
Mouse skin was dissected out immediately, quickly fixed in 10% buffered neutral formalin solution for 24 h, and embedded in paraffin. Serial sections (7 lm) were mounted onto silane-coated slides and stained with H&E, Verhoeff-van Gieson, and picrosirius red staining. The images were recorded using the Olympus DP70 Digital Camera System.