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Sites in human gingival tissues evaluated for immunohistochemistry staining. A: SE, sulcular epithelium; OE, oral epithelium; SSCT, subsulcular connective tissue; SOCT, suboral connective tissue; Scale bar = 0.14 mm, at ×25 magnification. B: Regions of epithelium; Scale bar = 50 μm, at magnification ×200 magnification.
