title: Stomach ulcer in young people.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002031:Bulgaria; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012737:Sex Factors; D013276:Stomach Ulcer / Q000175:diagnosis / Q000453:epidemiology*