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. 2017 Oct 26;45:33. doi: 10.1186/s41182-017-0073-6

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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. 5 — Tropical diseases research 1813–2016. Map of absolute research output on tropical diseases 1813–2016 measured by 253,277 publications in Europe PMC and geoparsed by MapAffil (all on the same QGIS linear heatmap scale with radius 1.25 and maximum value 25). Made with Natural Earth. Free vector and raster map data at naturalearthdata.com