title: Secondary operations for duodenal ulcer.
mesh_terms: D000328:Adult; D000368:Aged; D003967:Diarrhea / Q000209:etiology; D004377:Dumping Syndrome / Q000209:etiology; D004381:Duodenal Ulcer / Q000601:surgery*; D005747:Gastric Fistula / Q000209:etiology; D005756:Gastritis / Q000209:etiology; D005764:Gastroesophageal Reflux / Q000209:etiology; D006801:Humans; D007412:Intestinal Fistula / Q000209:etiology; D007415:Intestinal Obstruction / Q000209:etiology; D007443:Intussusception / Q000209:etiology; D007583:Jejunum; D008875:Middle Aged; D011183:Postoperative Complications; D012008:Recurrence; D013272:Stomach Diseases / Q000209:etiology; D013274:Stomach Neoplasms / Q000209:etiology