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Cross-sectional overview and closeups of the subcutaneous implantation model of the porcine aortal patch (PAP). Dashed line: implant, 1: epidermis, 2: dermis, 3: subcutaneous layer, a: tunica intima, b: tunica media, and c: tunica adventitia. (Images were stained with Azan, magnification: 20× and scale bars = 5 mm (overview) and 2 mm (magnified)).
