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Immunostaining of lymphocyte- and macrophage-specific surface markers in lung tissues. Immunohistochemical staining of lung tissues from patients in the IPF group with antibodies to CD3, CD8, and CD20 (upper panel), or CD68, CD163, and CD204 (lower panel). Original magnification ×400. Scale bar, 100 µm. IPF, idiopathic pulmonary fibrosis.
