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. 2019 Nov 5;10:1382. doi: 10.3389/fphys.2019.01382

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Copyright © 2019 Shei, Mackintosh, Peabody Lever, McNarry and Krick.

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.

PMC Copyright notice

Age-related decline in percent-predicted forced expiratory volume in 1 s (ppFEV₁) in people with CF, stratified by birth cohort (A). Prevalence of respiratory microorganisms by age cohort (B). Reprinted with permission from Cystic Fibrosis Foundation (2017).