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. 2019 Jun 26;10:1471. doi: 10.3389/fimmu.2019.01471

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Copyright © 2019 Tang, Yu, Li, Zhang, Xie and Liu.

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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The expression levels of the cytokines IFN-γ (A), IL-2 (B), IL-4 (C), and IL-5 (D) were determined by ELISA. Data are presented as the mean ± SD from triplicate experiments. ^*denotes P < 0.05.