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NG2 cells proliferate for at least 28 dpi. Number of Ki-67/NG2+ cells/mm3 in the rat spinal cord 0.9 mm rostral to the epicenter (A), at the epicenter (B), and 0.9 mm caudal to the epicenter (C) from 7 to 70 dpi. *p < 0.05; **p < 0.01; ***p < 0.001 versus naive.
