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Relationship between pain intensity and 90% circle diameter. The horizontal line and the grey area indicate the mean score of healthy controls and the standard deviations respectively. The vertical lines indicate standard deviations; the boxes show mean and 95% CIs respectively. Levels of significance compared to controls: * p ≤ 0.05, ** p ≤ 0.01, *** p ≤ 0.001.
