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. 2017 Aug 7;8:375. doi: 10.3389/fneur.2017.00375

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Copyright © 2017 Chwiszczuk, Breitve, Brønnick, Gjerstad, Hynninen, Aarsland and Rongve.

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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Number of subjects total and REM sleep behavior disorder (RBD) positive in each follow-up (*percentage of RBD positive patients within each diagnostic group; sum is not 100%).