title: Aspects of duodenal ulcer disease in Nigeria.
mesh_terms: D000293:Adolescent; D000328:Adult; D001741:Black or African American; D000368:Aged; D044383:Black People; D002648:Child; D004381:Duodenal Ulcer / Q000453:epidemiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009549:Nigeria