title: Predictors of duodenal ulcer relapse: a 12-month study in untreated patients.
mesh_terms: D000328:Adult; D000368:Aged; D004381:Duodenal Ulcer / Q000503:physiopathology*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D012008:Recurrence