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. 2019 Jan 30;12:527–542. doi: 10.2147/JPR.S186227

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© 2019 Zhang et al. This work is published and licensed by Dove Medical Press Limited

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Funnel plot comparing real acupuncture vs sham acupuncture.

Note: Outcome: pain changes after treatment (VAS, 0–10 cm scale).

Abbreviations: EA, electro-acupuncture; MA, manual acupuncture; SE, standard error; MD, mean difference.