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. 2016 Jan 18;11:3. doi: 10.1186/s40248-016-0041-8

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© Zilz et al. 2016

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. 4 — Kaplan Meier charts for leucocyte numbers (a) and PHQ-stress (b) using the respective median values as cut-off (leucocytes: median = 9.7 10³/μl, p = 0.028; PHQ-stress: median = 6, p = 0.023). PHQ, Patient Health Questionnaire; SGRQ, St. George’s Respiratory Questionnaire; STAI, State-Trait Anxiety Inventory