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. 2020 Mar 20;7:95. doi: 10.3389/fmed.2020.00095

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Copyright © 2020 Kawamura, Imamura, Kobayashi, Taniguchi, Nakazawa, Kato, Namba-Hamano, Abe, Uemura, Kobayashi and Nonomura.

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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Measurement of hydrogen (H₂) concentration diffused from whole blood samples using gas chromatography. All H₂ concentrations were adjusted to the H₂ concentration in air. Bars represent means ± standard error of the mean. *p < 0.05, n = 6.