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Aggressive behavior of mice treated with oil (open bars) or 3-bromo-7-nitroindazole (3BrN; black bars). Pair-housed mice reduced biting (A) and boxing (B) and increased attack latency (C) compared with singly housed mice. 3BrN increased aggression in singly housed mice but not pair-housed mice. * p < .05, effect of 3BrN; † p < .05, effect of housing condition.
