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TGF-β1 mRNA expression in lung tissues of IPF patient. In situ hybridization of TGF-β1 mRNA (A) and immunohistochemical staining of CD163 expression (B) in serial sections of lung specimens obtained from a patient with IPF. Original magnification ×400. Scale bar, 100 µm. TGF-β1, transforming growth factor-β1; IPF, idiopathic pulmonary fibrosis.
