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Continue to Chathttps://forschung.kssg.ch/en/projekte/666-ca209-577-a-randomized-multicenter-double-blind-phase-iii-study-of-nivolumab-or-placebo-in-subjects-with-resected-lower-esophageal-or-gastroesophageal-junction-cancer-checkmate-577-checkpoint-pathway-and-nivolumab-clinical-trial-evaluation-577