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Comparison of velocity in the open field test (OFT) (a) and traveled distance (b) in study groups at 3, 7, 14, and 21 days after injury (n = 6). Each bar represents mean ± SEM. ∗P < 0.05, ∗∗P < 0.01, ∗∗∗P < 0.001 compared with sham group. ∧P < 0.05, ∧∧P < 0.01, ∧∧∧P < 0.001 compared with vehicle group. TBI: traumatic brain injury; Veh: vehicle; and SC: stem cell.
