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. 2021 Apr 7;11:7669. doi: 10.1038/s41598-021-87452-z

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Comparison of vertical lung lengths (VLLs) between patients with IIPs and controls. VLLs in the exploratory (A–D) and validation cohorts (E–H). Mild and moderate/severe idiopathic interstitial pneumonias (IIPs) were defined as patients with %predicted forced vital capacity ≥ 80% and < 80%, respectively. White, black, light grey, and grey boxes represent controls, all patients with IIPs, mild IIPs, and moderate/severe IIPs, respectively.