title: The geographical distribution and possible factors in the aetiology of peptic ulcer.
mesh_terms: D000349:Africa; D000367:Age Factors; D000428:Alcohol Drinking; D002980:Climate; D003906:Developing Countries; D004032:Diet; D004381:Duodenal Ulcer / Q000453:epidemiology / Q000209:etiology; D004739:England; D005006:Ethnicity; D005260:Female; D006801:Humans; D066298:In Vitro Techniques; D007194:India; D008297:Male; D008409:Mastication; D010437:Peptic Ulcer / Q000453:epidemiology* / Q000209:etiology; D044469:Racial Groups; D012737:Sex Factors; D012907:Smoking; D014481:United States; D014507:Urbanization; D014852:Wales