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. 2021 Jan 19;11:1825. doi: 10.1038/s41598-020-80776-2

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© The Author(s) 2021

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 licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence 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 licence, visit http://creativecommons.org/licenses/by/4.0/.

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Greater Active Avoidance PTSD symptom severity is associated with increased thickness of the right paracentral, posterior cingulate, and superior occipital gyrus. Vertex-wise linear model tests across the cortical surface revealed two clusters that survived Monte-Carlo correction for multiple comparisons and were associated with greater PTSD re-experiencing symptom severity: the right paracentral and posterior cingulate (A,B), and superior occipital gyrus (C,D). Active Avoidance symptom severity scores (cluster C; score range of 0–8) were obtained from the PTSD Checklist for DSM-V (PCL-5). PTSD = posttraumatic stress disorder; R = right; SO = superior occipital.