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Ear vessel photographs (a), OR-PAM images (b), total hemoglobin concentration (c), and vascular density (d) changes before and after the cupping treatment. In (c), changes of artery and vein within the white box in (b) are presented with the red (yellow) line and blue (green) dashed line, respectively. , p < 0.05 (tested by one way ANOVA). The error bars in (c) are standard deviations.
