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Interaction between rhCRH genotype (C/C vs. C/T) and early rearing history (MR, mother-reared, vs. PR, peer-reared) on levels of environmental exploration during periods of social separation stress. Peer-reared T allele carriers exhibited lower levels of environmental exploration during stress than did other groups of study (mean + SEM, MR C/C = 135, MR C/T = 7, PR C/C = 64, PR C/T = 4). *, P < 0.05.
