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. 2021 Mar 31;18:14799731211005023. doi: 10.1177/14799731211005023

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© The Author(s) 2021

This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 License (https://creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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Figure 3. — sEGF-2, which participate as angiogenic and tumor progression factors, exhibited higher concentration in the serum of women with COPD-BS compared to those with COPD-BS, while PDGF-AA/BB and sTIE-2 did not change (n = 70). Bars represent Ln of ng/mL, median (interquartile range). (A) PDGF-AA/BB, (B) sTIE-2, (C) sEGFR-2. Bars represent Ln of ng/mL (interquartile range). COPD-BS, chronic obstructive pulmonary disease from BS exposure; COPD-TS, COPD from smoking; PDGF-AB/AA, platelet-derived growth factor-AB/AA; sTIE-2, soluble angiopoietin-2 receptor; sVEGFR-2, soluble vascular endothelial growth factor receptor. ***P < 0.0001.