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. 2020 Dec 3;11:599896. doi: 10.3389/fphys.2020.599896

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Copyright © 2020 Gauthey, Morra, van de Borne, Deriaz, Maes and le Polain de Waroux.

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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Study design. Consecutive sequences (active control-5 Hz, aLL-tVNS-5 Hz; aLL-tVNS-20 Hz) were randomly ordered and composed of 5 min-baseline, 10 min-stimulation, and 10 min-recovery phases. Apnea were performed before and after each sequence.