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. 2015 Mar 28;15:90. doi: 10.1186/s12906-015-0586-7

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© Yu et al.; licensee BioMed Central. 2015

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Overall and subgroup meta-analysis of trials comparing the combination of acupuncture plus other interventions versus other interventions alone in terms of the number of patients showing no ECG improvement. Group 1: Body acupuncture plus medicines versus medicines; Group 2: Electro-acupuncture plus medicines versus medicines; Group3: Needle-embedding plus medicines versus medicines.