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. 2017 Feb 28;23(8):1424–1433. doi: 10.3748/wjg.v23.i8.1424

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©The Author(s) 2017. Published by Baishideng Publishing Group Inc. All rights reserved.

This article is an open-access article which was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution Non Commercial (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.

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Receiver operating characteristic curves for preoperative and postoperative cytokeratin 19 and carcinoembryonic antigen mRNA levels in patients with gastric cardia cancer according to overall survival. A: Preoperative CK19 mRNA level; B: Postoperative CK19 mRNA level; C: Preoperative CEA mRNA level; D: Postoperative CEA mRNA level. AUC: Area under the curve; CK19: Cytokeratin 19; CEA: Carcinoembryonic antigen; ROC: Receiver operating characteristic.