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. 2021 Jul 4;24(1):76–83. doi: 10.1007/s12094-021-02671-0

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© The Author(s) 2021, corrected publication 2021

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. 1 — a Cumulative overall survival (OS) curves of all patients with pancreatic cancer; b OS curves of patients undergoing surgery alone (S) or surgery combined with radiotherapy (S + R). The log-rank test showed that the OS was significantly different between the two groups (p < 0.0001). S: surgery, S + R: surgery plus radiotherapy; c OS curves of patients undergoing surgery alone (S) or surgery combined with radiotherapy (S + R) after propensity score matching (PSM). The log-rank test showed that the OS was significantly different between the two groups (p < 0.0001). S: surgery, S + R: surgery plus radiotherapy