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. 2015 Mar 12;19(1):106. doi: 10.1186/s13054-015-0844-6

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© Liebau et al.; licensee BioMed Central. 2015

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Plasma urea concentrations in critically ill patients during baseline and parenteral amino acid supplementation (AA) on 2 study days. On the first study day, 13 patients were studied, and on the second study day, 7 of these patients were still being treated in the intensive care unit and were studied again. The seven patients studied twice are indicated by continuous lines, and the other five studied on day 1 only are indicated by dashed lines. Individual values are given, with the median in red.