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. 2017 Sep 21;47(11):1399–1404. doi: 10.1007/s00247-017-3834-9

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© The Author(s) 2017

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 2 — Anteroposterior radiograph cropped to the right hemithorax of a 2 month old female hospitalized with WHO-defined very severe clinical pneumonia. Reference measurement of one posterior rib and the adjacent rib space (double-arrow a). Estimated maximum short-axis diameter of a wedge-shaped dense opacity (double-arrow b)