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. 2020 May 8;10:7787. doi: 10.1038/s41598-020-64759-x

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© The Author(s) 2020

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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Receiver operating characteristics curve analysis of Haptoglobin-related protein to differentiate idiopathic pulmonary fibrosis (IPF) from controls. Sensitivity (Y-axis) is plotted against 1-specificity for haptoglobin-related protein (Uniprot Accession: P00739) to differentiate between IPF and controls. Area under the curve value is shown on the ROC curve together with 95% confidence interval. At cutoff of 75400 (normalized abundance level), 80% of sensitivity and 80% of specificity was achieved. At right side of ROC curve, a box plot is shown to compare the two groups with individual samples shown as empty circles for cases (IPF) and black filled circles for controls.