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Quantification of cortical insulin-like growth factor-1 (IGF-1) protein levels after controlled cortical impact (CCI) injury. IGF-1 levels measured by enzyme-linked immunosorbent assay (ELISA) were transiently increased 1 h after 0.5-mm CCI (*p < 0.05 compared to sham animals; n = 2 for sham animals, 6 for injured animals, per time point).
