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. 2022 Aug 26;13:905564. doi: 10.3389/fphar.2022.905564

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Copyright © 2022 Wang, Liu, Liu, Han, Kang, Liang, Jiang, Meng, Chen, Xu, Wu and Hao.

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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Flowchart of participant inclusion and exclusion. IBS, irritable bowel syndrome; non-IBS, participants without IBS; PI-IBS, post-infectious IBS; non-PI-IBS, participants without PI-IBS but with IBS; and IBS-SSS, IBS symptom severity score.