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. 2020 May 16;24:131–137. doi: 10.1016/j.jot.2020.04.010

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© 2020 The Author(s)

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

PMC Copyright notice

The co-occurrence network of the top-100 keywords and the distribution of top-50 keywords the in the publications supported by NIH (A, B) or NSFC (C, D). (A) The co-occurrence network of the top-100 keywords supported by NIH. (B) The distribution of top-50 keywords the in the publications supported by NIH. The analysis was performed by VOSviewer [2]. (C) The co-occurrence network of the top-100 keywords supported by NSFC. (D) The distribution of top-50 keywords the in the publications supported by NSFC.