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. 2018 Feb 28;12:101. doi: 10.3389/fnins.2018.00101

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Copyright © 2018 Cai, Lee, Ba, Garg, Kim, Liu, Kim, Wang and McKeown.

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 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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The correlation relationship between the overall PPN connectivity and UPDRS scores in the PD group. The inset shows the relationship between the overall PPN connectivity and the retropulsion test scores from the UPDRS.