Fig. 8

Representative images of semi thin sections (a–d) and transmission electron micrographs (e–l) of transverse sections of distal regenerated nerves taken at 16 weeks after nerve grafting from the autograft group, ADSC group, BMSC group, and the CEANA group. Scale bars, 20 μm (a–d), 5 μm (e–h), and 0.2 μm (i–l). Histograms comparing the diameter of myelinated fibers (m) and the thickness of myelin sheath (n) among the three (not 4) different groups. *p < 0.05 versus CEANA group, ^§p>0.05 versus BMSC group