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. 2017 Dec 19;7:17842. doi: 10.1038/s41598-017-17865-2

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© The Author(s) 2017

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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Cytokine for age percentile; solid line represents the 50^th and dotted lines the 5^th and 95^th percentile, respectively. Data are presented on a semi-logarithmic scale (log10-scale for cytokines, normal-scale for age). For cytokines 10⁻² pg/mL equals a concentration of 0.01 pg/mL, 10⁰ equals 1 pg/mL, 10² equals 100 pg/mL. Note that the depicted range of concentration differs between stimulants for better readability. For IL-2, IL-4, IL-6 and IL-10 percentiles for unstimulated samples were not quantifiable.