Duodenal perforation--a prospective analysis.
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D004381:Duodenal Ulcer / Q000150:complications*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010439:Peptic Ulcer Perforation / Q000453:epidemiology* / Q000601:surgery; D011446:Prospective Studies; D013019:South Africa