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Changes in visual analogue scale (VAS) score for chronic neck pain. There were significant reductions in pain intensity in the three groups at each point of assessment compared with baseline (*p<0.05, **p<0.01) but there was no difference between the three groups (repeated measure analysis of variance, analysis of covariate). AC group, acupuncture treatment only; NS group, NSAID treatment only; AN group, acupuncture with NSAIDs.
