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Changes in pain threshold from RCS in the short-term follow-up study. The pain threshold was measured from 6 days before to 4 days after the start of RCS (solid circles) and compared with the controls (non-RCS, open circles) (n = 12, respectively). Obvious decreases in pain threshold were induced by RCS. Each circle and bar represent the mean and SE. *p < 0.05 vs. corresponding control by two-way repeated measures ANOVA followed by Tukey’s multiple comparison test
