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Immunohistochemical staining for CD68-positive non-specific macrophages 2 weeks after implantation. Immunohistochemistry for CD68-positive cells. CD68 is one of the glycoproteins expressed in the monocytes and macrophages. Two weeks after implantation of MSC-CM, CD68-positive macrophages were not apparent in the MSC-CM group. Bar = 200 μm.
