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. 2022 Jul 7;10:915648. doi: 10.3389/fchem.2022.915648

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Copyright © 2022 Sun, Bai, Yang, Bu, Tanveer and Hai.

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Keyword co-occurrence and clustering knowledge graph. (A) Based on VOS viewer software (frequency≥ 20). (B) Based on CiteSpace software (top 5 categories). (C) Knowledge structure graph.