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Correlation between total number of recalled words during the immediate recall phase of the word learning task and the cortisol concentrations in blood at drug peak (= before cognitive tests). 1: MDMA = Placebo (9.30AM) + MDMA (75 mg) (10.30AM); 2: metyrapone = metyrapone (750 mg) + Placebo; 3: metyrapone (750 mg) + MDMA (75 mg); 4: Placebo = Placebo MDMA + Placebo metyrapone.
