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Timeline of laboratory procedures to evaluate smoking-lapse during stress versus neutral imagery. Note: Assessment of cortisol and ACTH occurred at −30 min, −15 min, +10 min, +20 min, +40 min, and +60 min from the imagery procedure and remained fixed regardless of when the termination of the delay period occurred. Assessments of craving, emotion, physiologic reactivity, and nicotine withdrawal occurred at −15min, +5min, and termination of the delay.
