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Number of surviving CA3 hippocampal neurons per HPF (×400) ± SEM at 21 days after TBI with secondary hypoxemic insult in rats treated with saline, AG, or L-NIL, and in shams. The number of surviving CA3 hippocampal neurons was reduced by TBI (*P < 0.05 for saline vs. sham). Treatment with either of the iNOS inhibitors further reduced CA3 hippocampal neuron survival (AG and L-NIL both P < 0.05 vs. *sham or **saline).
