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. 2021 Jun 22;18(13):6705. doi: 10.3390/ijerph18136705

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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The number of AI papers on ArXiv over time by subcategory from 2010 to 2019. The x-axis of the graph is the year of publication (collected from 2010 to 2019) and the y-axis is the number of the AI papers on ArXiv split by sub-categories of AI research. The data is provided by “2019 AI Index Reports by Stanford” [1].