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The R-R interval (RRI) data series during B1 baseline (A in both top and bottom figures), negative picture cue exposure (B in top figure), and paced breathing (B in bottom figure) conditions from a placebo session. Mean RRIs (SD) during baseline, negative picture cue exposure, and paced breathing were 8.20 (.32), 7.99 (.44), and 8.41 (.75), respectively.
