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CD4+CXCR5+ cells in involved tissues of patients with IgG4-RD. Sections were stained for CD4 (red), CXCR5 (green), cells in yellow indicate the coexpression of CD4 and CXCR5. Upper row, lacrimal gland; middle row, pancreas; lower row, pancreas. Scale bars, 20 µm; magnification, ×400. IgG4-RD, immunoglobulin G4-related disease; CD4, cluster of differentiation 4; CXCR5, C-X-C chemokine receptor type 5.
