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Toluidine blue staining of midline sections of (A) control fibers and (B) RGD-fibers imaged at 20× shows the presence of regenerated nerve tissue. Toluidine blue staining on midline sections imaged at 100× of (C) control fiber and (D) RGD-fiber samples (from boxed regions from A and B, respectively) showing myelinated axons (white arrow with red circle), fibers, and red blood cells (yellow arrow).
