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. 2022 Jul 28;13:969217. doi: 10.3389/fimmu.2022.969217

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Copyright © 2022 Liu, Zhao, Li, Zheng, Wu, Kong and Shen

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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(A) Geographic distribution map based on the total publications of different countries/regions. (B) The changing trend of the annual publication quantity in the top 10 countries/regions from 2002 to 2021. (C) The international collaborations visualization map of countries/regions. (D) The countries/regions citation overlay visualization map generated by using VOSviewer. Each node means a country/region, and the size of node indicates the number of publications. The connection between the nodes represents the citation relationship, and the thickness of the connection lines indicates citation strength.