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. 2021 Nov 5;100(44):e27435. doi: 10.1097/MD.0000000000027435

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Copyright © 2021 the Author(s). Published by Wolters Kluwer Health, Inc.

This is an open access article distributed under the terms of the Creative Commons Attribution-Non Commercial License 4.0 (CCBY-NC), where it is permissible to download, share, remix, transform, and buildup the work provided it is properly cited. The work cannot be used commercially without permission from the journal. http://creativecommons.org/licenses/by-nc/4.0

This article is made available via the PMC Open Access Subset for unrestricted re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for the duration of the COVID-19 pandemic or until permissions are revoked in writing. Upon expiration of these permissions, PMC is granted a perpetual license to make this article available via PMC and Europe PMC, consistent with existing copyright protections.

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Relation between GGO and pleurae occur in non-subpleural area. A: GGO with clear margin and uneven density in the superior lingular segment of the upper lobe of left lung (white arrow); B, C: GGO with ambiguous margin and uneven density in the posterior basal segment of the lower lobes of left lung (white arrow); D: GGO with ambiguous margin and even density in the posterior segment of the upper lobe of right lung (white arrow). GGO = ground-glass opacification.