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. 2018 May 9;19(5):1421. doi: 10.3390/ijms19051421

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© 2018 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Kaplan–Meier graphs of the study population. (A) Survival data for moderate (group 1: UICC stadium I and II) and advanced (UICC stadium III and IV) cholangiocarcinoma (CCA) patients. (B) Survival data according to CCA location in the biliary tree (1: intrahepatic CCA, 2: perihilar CCA, 3: distal CCA).