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. 2021 Oct 20;15:746057. doi: 10.3389/fnana.2021.746057

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Copyright © 2021 Kim, Ryu, Lee, Chae, Son, Park, Cho and Sun.

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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Three-node motifs analysis. (A) The 13 different ways (classes) to connect three nodes in a directed network. (B) Distribution profile of 13 motifs from 8 networks in Figure 4.