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. 2015 Oct 9;15:118. doi: 10.1186/s12872-015-0114-1

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© Bundhun et al. 2015

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. 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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Fig. 1 — Flow diagram for the study selection. One thousand five hundred eighty six articles were identified from PubMed, Embase/Science Direct, CNKI, Wanfang and Cochrane databases. After considering the inclusion and exclusion criteria, finally 8 RCTs were selected and included in this meta-analysis. Showing the detailed flow chart of study selection