title: Duodenal ulcer and gastric cancer.
mesh_terms: D000328:Adult; D000368:Aged; D004381:Duodenal Ulcer / Q000150:complications* / Q000453:epidemiology; D006801:Humans; D008875:Middle Aged; D013274:Stomach Neoplasms / Q000150:complications* / Q000453:epidemiology