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. 2016 Feb 22;10:19. doi: 10.3389/fnbeh.2016.00019

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Copyright © 2016 Endres, Putman, Ernst, Kurth, Lohmann and Lohmann.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution and 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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Proportion of time that airborne odor particles intersect the 25-year intensity isoline (yearly averages). Error bars represent 95% confidence intervals.