[Peptic ulcer--from the standpoint of internal medicine].
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D002648:Child; D004381:Duodenal Ulcer / Q000175:diagnosis / Q000628:therapy; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010437:Peptic Ulcer / Q000453:epidemiology / Q000209:etiology; D012737:Sex Factors; D013276:Stomach Ulcer / Q000175:diagnosis / Q000628:therapy