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. 2022 Mar 8;16:803297. doi: 10.3389/fnins.2022.803297

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Copyright © 2022 Abdalmalak, Novi, Kazazian, Norton, Benaglia, Slessarev, Debicki, Lawrence, Mesquita and Owen.

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 plot for the correlation coefficients for each participant and preprocessing method for (A) oxy-hemoglobin (HbO), (B) deoxy-hemoglobin (HbR), and (C) total-hemoglobin (HbT) concentrations. The different colors correspond to different preprocessing approaches: no extracerebral regression (gray), after regression with additional physiological measurements (violet), after regression with short channels (red), and after regression with short channels combined with physiological measurements (green).