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. 2021 Feb 9;12:601153. doi: 10.3389/fneur.2021.601153

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Copyright © 2021 Gallay, Moser, Magara, Haufler and Jeanmonod.

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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Average scores showing total Unified Parkinson's Disease Rating Scale (UPDRS) scores (orange) in on- and off-medicated state, measured preoperatively (baseline) and at 1-year follow-up. Average scores with standard deviation shown in blue are the evolution of partial UPDRS III scores of the first (labeled side 1 or 1) and the second (labeled side 2 or 2) PTTs. *, statistically significant.