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. 2020 Jun 25;124(3):2687–2701. doi: 10.1007/s11192-020-03587-2

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© Akadémiai Kiadó, Budapest, Hungary 2020

This article is made available via the PMC Open Access Subset for unrestricted research re-use and secondary analysis in any form or by any means with acknowledgement of the original source. These permissions are granted for the duration of the World Health Organization (WHO) declaration of COVID-19 as a global pandemic.

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Fig. 4 — a The distribution of affiliation (top graphs) and author (bottom graphs) count per article. The two graphs on the left represent the affiliation and author count distribution on all articles, while graphs on the right represent the affiliation and author count distribution only for original research papers. Based on the data retrieved with search phrases No. 3 (COVID-19), No. 4 (Year 18/19), No. 5 (Not COVID-19) for all publication types and only for original research papers. b Number of articles from each country based on Scopus database, with SCP:MCP ratio indicated by color. c A map displaying number of papers per country (indicated with intensity of blue color) and collaborations (indicated with lines). A graph presented in a is based on data retrieved from PubMed on 11th of April 2020, and b, c are based on the data downloaded from Scopus database on the same date. (Color figure online)