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Histopathological evaluation of dorsal Root Ganglion neurons in the treatment and control groups. A: Death of dorsal Root Ganglion (DRG) neurons in the control group that treated with normal saline, there were not nucleolus and nuclei (arrow), (H&G, x400). B: Note that of dorsal Root Ganglion (DRG) neurons in the experimental groups that treated vitamins B12, there were nucleolus and nuclei (arrow), (H&Gx400).
