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. 2022 Jul 20;481(3):351–366. doi: 10.1007/s00428-022-03344-1

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© The Author(s) 2022

Open AccessThis 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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Fig. 4 — Error rates in lung cancer biomarker analysis for EGFR, ALK, and ROS1 across EQA schemes run by the European Society of Pathology, 2012–2015 [58]. Figure adapted from Keppens et al. [58]. Copyright © 2021 The Authors. Published by Impact Journals. All rights reserved. Reproduced under the terms of Creative Commons Attribution 3.0 International (CC BY 3.0) license. ALK anaplastic lymphoma kinase, EGFR epidermal growth factor receptor, EQA external quality assessment, FISH fluorescent in situ hybridisation, IHC immunohistochemistry, ROS1 ROS proto-oncogene 1