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Clinical and psychometric validation of a questionnaire module, the EORTC QLQ-OG25, to assess health-related quality of life in patients with cancer of the oesophagus, the oesophago–gastric junction and the stomach

Quality Of LifeLife AssessmentPsychometric ValidationEsophageal CancerEortc Qlq-og25Gastrointestinal OncologyMedicineCancer ManagementQuestionnaire ModuleOutcomes ResearchPatient-reported OutcomeLogistic AnalysisOncologyCancer Research