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Mood changes: within-group differences for pre vs. post MJ use. Mood change was assessed in both MJBP and MJ participants after episodes of MJ smoking that occurred within four hours of a mood rating; this revealed significant mood improvement in the MJBP group after smoking MJ and a slight worsening of symptoms in the MJ group after smoking MJ. **p ≤ 0.05, *p ≤ 0.10.
