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Time of emergence from a dark container into a novel aversive environment by (A) female and (B) male rats on postnatal day 25 following daily exposure from postnatal day 10 through 16 to either corn oil (control) or 0.5, 0.75, or 1.0 mg/kg chlorpyrifos (CPF). Values are expressed as time ± SE (n =13–23). Bars indicated with an asterisk (*) are statistically significant (p ≤ 0.05) from control.
