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Effects of diazepam (3 mg kg−1) and amphetamine (1 mg kg−1) on an elevated plus maze (a, b) and on ambulatory activity (c, d). Data are expressed as the mean±s.e.m. (n=7–10/group for a, b; n=20 for saline group and n=8 for all other groups for c, d). *P<0.05, **P<0.01 and ***P<0.001.
