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. 2021 Dec 6;30(4):413–419. doi: 10.1038/s41431-021-01011-8

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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 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 — Bar chart showing, for each year of testing, numbers of the index and non-index cases identified for MLH1, MSH2 and MSH6, PMS2. Arrows denote changes to diagnostic testing strategies. Data for the total number of annual diagnostic tests undertaken is from 2003. MSI microsatellite instability (studies); IHC immunohistochemistry.