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Influence of nerve growth factor (NGF)- microspheres on the morphology of regenerated nerve fibers of cross-sectioned injured facial nerve in rabbits at 90 days (hematoxylin-eosin staining, × 400)
(A) NGF-microspheres group; (B) NGF group; (C) normal saline group; (D) autologous nerve group.
The myelinated nerve fibers were uniform and larger in groups A and D than in groups B and C.
