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Changes of abdominal pain GSRS scores (abdominal and hunger pain) after treatment with (A) a PPI or (B) a PPI + rikkunshito. Closed circles indicate mean scores. *P<0.05 vs. the score at baseline (Wilcoxon signed-rank test). GSRS, Gastrointestinal Symptom Rating Scale; PPI, proton pump inhibitor; ESD, endoscopic submucosal dissection.
