Light microscopic findings in the study groups. Representative pictures stained with periodic acid Schiff (PAS; A–C), silver (D–F) and Masson trichrome (G–I) in a LETO rat (A, D, G), an OLETF-CON rat (B, E, H) and an OLETF-SIL rat (C, F, I). LETO, Long-Evans Tokushima Otsuka; OLETF, Otsuka Long-Evans Tokushima Fatty. Original magnifications, ×400 (A–C), ×100 (D–F) and ×40 (G–I).