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. 2019 May 10;17:150. doi: 10.1186/s12967-019-1902-7

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© The Author(s) 2019

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 — Residuals of the linear regression between the number of articles and the expenditures for research and development in mill. US-Dollar (R&D) and the number of articles and the incidence crude rate (ICR). Threshold = 100 articles. Sorting according to number of articles. Officially countries’ Alpha-2 codes (CN = China, JP = Japan, US = USA, DE = Germany, GB = United Kingdom, FR = France, NL = Netherlands, IT = Italy, KR = South Korea, SE = Sweden, AU = Australia, CA = Canada, ZA = South Africa, ES = Spain, CH = Switzerland, RU = Russia, BE = Belgium, IE = Ireland)