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. 2019 Jun 7;10:719. doi: 10.3389/fphys.2019.00719

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Copyright © 2019 Scaramuzzo, Broche, Pellegrini, Porra, Derosa, Tannoia, Marzullo, Borges, Bayat, Bravin, Larsson and Perchiazzi.

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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Definition of regions of interest (ROIs). The brown area corresponding to the parenchyma around the heart has been excluded from the analysis to eliminate the motion artifacts connected to the heart activity.