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Immunohistochemical characterization of infiltrating cells in EL-Gel-FGF scaffold. A) immunostained for fibroblasts at 28 day, B) immunostained for smooth muscle α-actin at 28 day, C) immunostaining for macrophages at 7 day, D) immunostaining for macrophages at 28 day. The red lines indicate the scaffold-capsule interface. Insets show negative stains. Original magnifications 400 X.
