A 48-year-old woman with a long history of gastroesophageal reflux disease (GERD) undergoes upper endoscopy for persistent dysphagia. Biopsy from the distal esophagus shows replacement of the normal stratified squamous epithelium with columnar epithelium containing goblet cells (intestinal metaplasia). There is no dysplasia. What is the most appropriate next step in management?

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