title: [Chronic gastric and duodenal ulcer in children].
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D002908:Chronic Disease; D004381:Duodenal Ulcer / Q000453:epidemiology*; D005260:Female; D006801:Humans; D008297:Male; D011044:Poland; D013276:Stomach Ulcer / Q000453:epidemiology*
vernacular_title: Przewlekła choroba wrzodowa zoładka i dwunastnicy u dzieci.