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Results of the resident–intruder behavioral test in mice after i.p. injection to the resident of 0.9% NaCl or ACTH (1 μg) alone or together with IgG (100 μg) pooled from individual IgG samples from healthy controls (Ctr) or violent aggressors (Aggr). (A) Latency for the first contact. (B) Latency for the first attack. (C) Total number of attacks. (D) Total duration of all attacks. **P < 0.01; ***P < 0.001, Student’s t test. Data are shown as mean ± SE; n = 6 in each group.
