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. 2020 Jan 6;15:1–13. doi: 10.2147/COPD.S217474

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© 2020 Holz et al.

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Metabolomic markers, which do not show a significant difference between genders separately for smokers with (black) and without (white) COPD. Median and IQR, including the data of both exercise challenges. Horizontal axis: the four time points, vertical axis: concentration in µM.