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. 2024 Jun 26;14:14798. doi: 10.1038/s41598-024-64564-w

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© The Author(s) 2024

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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Intraobserver and Interobservers agreement plots of RFCSA measurements: (A) of the same operator over time and (B) interobserver agreement plot between 3 observers. Observers represent different symbols. The percentage differences of all measurements with the mean (y-axis) are plotted against the mean RFCSA for all participants (x-axis). The horizontal dashed lines indicate the limits of agreement with the mean of the three observers and ranged from −5.9 to 5.9% for interobserver (left) and from −8.2 to 8.2% for interobserver (right).