title: Veterans Administration cooperative study of surgery for duodenal ulcer. I. Description and evaluation of method of randomization.
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D004322:Drainage; D004381:Duodenal Ulcer / Q000601:surgery*; D005743:Gastrectomy; D005750:Gastric Juice / Q000378:metabolism; D006801:Humans; D008297:Male; D008722:Methods; D008875:Middle Aged; D009928:Organ Specificity; D010438:Peptic Ulcer Hemorrhage / Q000453:epidemiology; D010439:Peptic Ulcer Perforation / Q000453:epidemiology; D011446:Prospective Studies; D012189:Retrospective Studies; D013223:Statistics as Topic; D013276:Stomach Ulcer / Q000453:epidemiology; D014481:United States; D014493:United States Department of Veterans Affairs; D014628:Vagotomy