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. 2016 Feb 10;5:28. doi: 10.1186/s13643-016-0204-x

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© Miake-Lye et al. 2016

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 — Number of publications per year. The dark gray line denotes the number of publications in any given year, and the light gray line denotes the cumulative number of publications over time