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. 2022 Mar 3;17(3):e0264774. doi: 10.1371/journal.pone.0264774

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© 2022 Gonzales Carazas et al

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 6 — A Spearman test between two relevant biomarkers of lung function (ETCO₂) and blood biochemistry (PaCO₂) showed no correlation between these two values. The solid line represents the linear regression. Spearman R-score = 0.046 (p = 0.718).