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Morphological analysis of the injured sciatic nerves in different groups. The nerves were examined by electron microscopy. Representative images are shown. A – Uninjured sciatic nerves; B – injured sciatic nerves 3 weeks after 0.9% saline treatment; C – injured sciatic nerves 3 weeks after EPO (5000 U/kg) treatment. Arrows indicate the re-growth of myelin sheath, and blue circles indicate Schwann cells. Magnification: 5,000×
