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. 2018 May 10;8(5):e021495. doi: 10.1136/bmjopen-2018-021495

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Kaplan-Meier survival curves showing observed 5-year survival oesophageal adenocarcinoma (A) stratified by surgical treatment (yes or no). Patients undergoing oesophageal resection for adenocarcinoma (B) and not undergoing oesophageal resection for adenocarcinoma (C) are further stratified by calendar periods.