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Scores of immunohistochemical staining of IGF-1 in the sciatic nerves in different groups. The score is expressed as x ± s (A value) (n = 5). Group A, 0.9% saline treatment; group B, EPO (5000 U/kg) treatment
*P < 0.05 vs. group A at 3 weeks and 5 weeks, respectively.
