Endoscopic surveillance of patients with Barrett esophagus.
D001471:Barrett Esophagus / Q000473:pathology*; D004935:Esophageal Diseases / Q000473:pathology*; D004938:Esophageal Neoplasms / Q000517:prevention & control*; D004945:Esophagoscopy / Q000009:adverse effects / Q000191:economics; D006801:Humans