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. 2018 Aug 7;8:11820. doi: 10.1038/s41598-018-30235-w

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© The Author(s) 2018

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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.

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DPP4 activity levels negatively correlate with post-operative organ morbidity and ICU stay. (a,b) Correlations between relative serum DPP4 activity levels 12 h post-OP and circulating creatinine levels (a) and lactate levels (b) on the first post-operative day. (c) Correlations between relative serum DPP4 activity levels 12 h post-OP and ICU stay. (a–c) Data are depicted as linear regression (black line) with 95% confidence intervals (dashed lines). r = Spearman correlation coefficient; two-tailed P-value; *P < 0.05; **P < 0.01.