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. 2021 Mar 25;15:614142. doi: 10.3389/fnins.2021.614142

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Copyright © 2021 Dai, Chen, Dai, Jiang, Tian, Liu, Xu, Li, Zhou, Liu and Chen.

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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Unknown factors discovered by SVA (A) and PEER (B) and terminal state correlation. (A) Surrogate variables 1, 2, 4, 5, 6, 7, 9, 10, 12, and 14 have a significant correlation with terminal states; (B) Hidden factors 1, 2, 4, 5, 8, 9, 10, 12, 13, and 15 have a significant correlation with terminal states.