title: A prospective study of 200 endoscopically proven cases of duodenal ulcer.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D004381:Duodenal Ulcer / Q000175:diagnosis*; D004384:Duodenoscopy; D005002:Ethiopia; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies