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. 2017 Dec 4;11:64. doi: 10.3389/fnbot.2017.00064

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Copyright © 2017 Liu, Liu, Meng, Ai and Xie.

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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Experimental setup of the human-ankle robot system for compliance control tests. The participant had agreed by written informed consent for using his picture.