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. 2019 May 28;10:542. doi: 10.3389/fneur.2019.00542

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Copyright © 2019 Meira e Cruz, Lukic, Wojczynska, Steiger, Guimarães and Ettlin.

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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Box plots representing the age distribution by gender of the 352 patients responding positively to the screening question on insomnia and/or hypersomnia. Star symbol (^*) indicates mean.