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. 2020 Oct 13;10:345. doi: 10.1038/s41398-020-01023-w

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© The Author(s) 2020

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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Fig. 2 — a Experimental design and timeline of Experiment 2. b Mean differential skin conductance response (SCR; CS⁺ minus CS^–) during fear acquisition, the fear memory test, and the reinstatement test for each of the experimental groups (CS1 retrieval + propranolol [n = 17], US retrieval + propranolol [n = 15]). *p < 0.05, comparisons between acquisition and first three trials of test; ^#p < 0.05, comparisons between last three trials of test and reinstatement (all within-group). The data are expressed as mean ± SEM.