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. 2015 Jul 16;15:70. doi: 10.1186/s12872-015-0050-0

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© Zheng et al. 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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Fig. 4 — Forest plots for the differences in serum S-100 beta (S-100β) and neuron specific enolase (NSE) levels between on-pump and off-pump groups after surgery (a: S-100β; b: NSE; SMD: standardized mean difference; CI: confidence interval)