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Morphometric analysis of middle sections from regenerated facial nerve 12 weeks after surgery. (A) Toluidine blue staining. (B) TEM images. (C) Number of myelinated nerve fibers/1000 μm2. (D) Thickness of myelin sheath. (E) Diameters of myelinated nerve fibers. *P < 0.05, **P < 0.01 (n = 3).
