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The protocol for fMRI scanning included four resting-state fMRI scans, with two mood inductions (i.e., happy and sad moods) completed between these scans. The two inductions occurred before the second and fourth resting-state scans, and were counterbalanced across participants. The second baseline (i.e., scan 3) and happy mood scans were not analyzed for the present study. Mood and pain ratings were collected before and after each scan and mood induction.
