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CGRP-positive fibers in different groups. Arrows indicate the representative files of CGRP-stained files. Phosphate-buffered saline was substituted for the anti-CGRP antibody in the blank control ones. Magnification, ×200. Sham, sham-operated; Model, bilateral dorsal root ganglionectomy injury; EA Model, electro-acupuncture treatment post-injury; CGRP, calcitonin gene-related peptide; IGF-1, insulin-like growth factor 1; siRNA, small interfering RNA.
