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. 2015 Feb 13;14:14. doi: 10.1186/1475-2891-14-14

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© Yin and Phung; licensee BioMed Central. 2015

This article is published under license to BioMed Central Ltd. 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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Forest plot depicting results from each subtype of Cr supplement evaluating the effects of A1C vs. placebo based on year of publication. Note: The squares represent the pooled results of that study in addition to all studies preceding it. Error bars represent 95% CIs and the diamond represents the overall pooled results. The solid vertical line extending upward from 0 is the null value.