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. 2017 Jun 26;3:22. doi: 10.1186/s40942-017-0075-x

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© The Author(s) 2017

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. 2 — Diagram showing correlation between changes of pH in saline and vitreous. Orientation of the arrows shows the course of increasing amount of added drugs. Slopes and correlation coefficients were calculated by linear regression, and p values by Spearman correlation