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. 2021 Jun 1;406(5):1499–1509. doi: 10.1007/s00423-021-02154-4

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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 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 — Overall survival according to lymph node and R status. Kaplan Meier curves of overall survival. A All resected patients with perihilar cholangiocarcinoma with and without lymph node metastases (N0 and N+) according to R status. B All resected patients with perihilar cholangiocarcinoma with and without lymph node metastases (N0 and N+) excluding 90-day mortality according to R status. C Resected patients with perihilar cholangiocarcinoma without lymph node metastases (N0) according to R status. D Resected patients with perihilar cholangiocarcinoma without lymph node metastases (N0) excluding 90-day mortality according to R status. E Resected patients with perihilar cholangiocarcinoma with lymph node metastases (N+) according to R status