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Comparison of symptomatic reflux episodes versus asymptomatic reflux episodes according to gastroesophageal reflux disease subtypes. In patients with erosive reflux disease and symptomatic non-erosive reflux disease patients, symptomatic reflux was more frequently acidic (*P < 0.05). Sx, symptom; ERD, erosive reflux disease; NERD, non-erosive reflux disease.
