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. 2023 Sep 26;149(19):17051–17069. doi: 10.1007/s00432-023-05350-5

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© The Author(s) 2023

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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Fig. 9 — Kaplan–Meier curves of all patients (outcome: progression-free survival). The upper graph shows T-stages (Unknown = main tumor size could not be measured). UICC-stages are shown on the graph below (X = UICC stage could not be measured). All graphs were censored 60 months after treatment