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. 2019 Jan 7;19:3. doi: 10.1186/s12877-018-1008-8

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© The Author(s). 2019

Open AccessThis 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. 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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Fig. 2 — Receiver operating characteristic curve of age, Charlson comorbidity index (CCI), procalcitonin (PCT) levels, white blood cell (WBC) counts, C-reactive protein (CRP) levels, blood urea nitrogen (BUN), pneumonia severity index (PSI) class, body mass index (BMI), and albumin levels for prediction of 30-day mortality of patients older than 75 years