Fig. 2

(a) mean of treatment satisfaction score, measured by the numerical rating scale (NRS), in both groups in the 6-week assessment and final assessment; where 0 is totally satisfied and 10 is totally dissatisfied (b) distribution of volunteers from both groups (IG = intervention group; SUG = sham ultrasound group) according to the individual's perception of change due to treatment, assessed during the 6-week assessment and final assessment (8-week assessment)