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VAS ratings for patient 4 during phase 1, double-blind crossover study.
Notes: Two periods of five daily stimulation sessions, 10 minutes versus 0.5 minutes (intended sham), respectively. Squares indicate VAS ratings before stimulation (pre) and triangles indicate ratings directly after (post).
Abbreviations: FU, follow-up at 1 week; min, minute; VAS, visual analog scale.
