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. 2017 Jan 8;21:5. doi: 10.1186/s13054-016-1585-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. 4 — Forest plot of association between use of normal saline (NS) vs heparin saline (HS) and the incidence of catheter occlusion. RR relative risk, CI confidence interval, NS normal saline, HS heparin saline