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Anxiety as a function of imagery condition and placebo vs. PREG treatment groups. Stress-induced anxiety was significantly higher in the 300 mg PREG group compared to neutral (p = 0.016), and in the placebo group in response to stress (p < 0.001) and cocaine cue (p < 0.001) compared to neutral, but not in the 500 mg PREG group (p = n.s.). All data are displayed as mean ± S.E.M. * Significance represents condition relative to neutral. * p < 0.05; *** p < 0.001.
