Operative risk for patients with duodenal ulcer.
D004381:Duodenal Ulcer / Q000601:surgery*; D005743:Gastrectomy / Q000009:adverse effects*; D005763:Gastroenterostomy / Q000009:adverse effects*; D006801:Humans; D009026:Mortality; D011183:Postoperative Complications; D014628:Vagotomy / Q000009:adverse effects*