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. 2020 Nov 15;12(11):1346–1363. doi: 10.4251/wjgo.v12.i11.1346

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©The Author(s) 2020. Published by Baishideng Publishing Group Inc. All rights reserved.

This article is an open-access article that was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution NonCommercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/Licenses/by-nc/4.0/

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Overall survival and progression-free survival. A: 6-mo overall survival (OS); B: 6-mo progression-free survival (PFS); C: 12-mo OS; D: 12-mo PFS.