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Monolayer permeability assay demonstrating the effect of TBI serum on BBB endothelial cell permeability. Samples were diluted to 1:2 and 1:3. The FITC-dextran fluorescence intensity obtained following exposure of the cells to control samples (n = 12) was considered to be 100% and the fluorescence intensity from the TBI group (n = 12) was compared to the control. P < 0.05.
