Figure 22: Masson’s Trichrome staining of lung sections. Lung tissues were fixed in 4% paraformaldehyde overnight at 4°C, embedded in paraffin, cut into 5 μm sections, stained and observed under light microscope (Olympus). A, D, G: Lung sections observed under 10X magnification; B, E, H: sections observed under 40X magnification; C, F, I: Lung sections observed under 100X magnification.