title: Peptic ulcer: the changing scene.
mesh_terms: D002908:Chronic Disease; D004381:Duodenal Ulcer / Q000453:epidemiology / Q000209:etiology; D005260:Female; D006801:Humans; D008297:Male; D012306:Risk; D012737:Sex Factors; D013276:Stomach Ulcer / Q000453:epidemiology / Q000209:etiology; D006113:United Kingdom