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. 2020 Feb 18;14:126. doi: 10.3389/fnins.2020.00126

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Copyright © 2020 Ueha, Ueha, Kondo, Nishijima and Yamasoba.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Tnfa, Il1b, Il4, Il5, Il13, Il17, Il25, and Il33 expression levels in the nasal mucosa were quantified by real-time quantitative reverse transcription polymerase chain reaction and are expressed relative to the expression of the endogenous control gene Rps3 (n = 5; *P < 0.05, **P < 0.01, one-way analysis of variance). Tnfa, tumor necrosis factor-alfa; Il1b, interleukin-1β; Il4, interleukin-4; Il5, interleukin-5; Il13, interleukin-13; Il17, interleukin-17; Il25, interleukin-25; Il33, interleukin-33; OVA, ovalbumin; CSS, cigarette smoke solution.