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. 2017 Nov 23;11:560. doi: 10.3389/fnhum.2017.00560

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Copyright © 2017 Liu, Chen, Chavarriaga, Pei and Millán.

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) or licensor 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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Topographic maps to show the normalized DP index of each channel averaged across all subjects and conditions. The weights were assigned by the modified CVA for the MRCP-based and SMR-based methods.