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. 2021 Oct 26;8:740710. doi: 10.3389/fmed.2021.740710

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Copyright © 2021 Hu, Alimire, Lai, Hu, Chen and Li.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Analysis of publication trend and distribution changes of subject categories. (A) Trends in the number of publications and citations on cancer gene therapy from 2016 to 2020; (B) Distribution characteristics of subject categories on cancer gene therapy from 2016 to 2020; (C) Distribution characteristics of subject categories on cancer gene therapy from 2011 to 2015. The blue arrows denoted a remarkable increase in the proportion of subjects “Materials Science” and “Nanoscience and Nanotechnology” during 2016–2020 compared to that during 2011–2015.