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Photomicrographs of kidney in control rat. (A, B) Hematoxylin-eosin staining (×200); (C, D) Sirius Red staining under light microscope (×400); (E, F) Sirius Red staining under polarized light microscope (×400). (A, C, E) cortex; (B, D, F) medulla. Gl = glomerula; Pt = proximal tubules; Dt = distal tubules; Vr = vasa recta; Hl = Henle loops.
