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(A–D) Histology of the rat spinal cord. Green fluorescent protein-labeled rat OECs survived in injured rat spinal cord until 2 weeks post transplantation. (A) Phase contrast, (B) GFP cells around the injury epicenter, (C) Merged image of A and B showing GFP-labeled OECs in the spinal cord transection (20× magnification). OEC, olfactory ensheathing cell; GFP, green fluorescent protein.
