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Immunohistochemical staining for cartilage oligomeric matrix protein (COMP) expression. COMP was positively stained in keloid lesions in the upper dermis (A) COMP staining; (D) H&E staining, ×200 magnification; and in the lower dermis (B) COMP staining; (E) H&E staining, ×200. COMP was detected on the wavy keloid-derived fibroblasts (KDFs); (C) COMP staining; (F) H&E staining, ×400.
