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. 2020 Feb 7;20:39. doi: 10.1186/s12906-020-2832-x

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© The Author(s). 2020

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 — The river chart of the 10 journals with the highest number of articles. Each journal has its theme color and the width of lines represents the number of articles. The flow direction is from left to right, ranging from 2004 to 2018