Fig. 6From: Bone marrow mesenchymal stromal cells attenuate silica-induced pulmonary fibrosis potentially by attenuating Wnt/β-catenin signaling in ratsLung histopathology on the 56th day after exposure to silica suspension in each group: Masson staining of lung tissue, magnification × 50, × 100, and × 200 (arrows indicate the deposition of collagen fibers)Back to article page