title: The natural history of peptic ulcer--views in the 1980s.
mesh_terms: D000328:Adult; D000368:Aged; D003365:Costs and Cost Analysis; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010437:Peptic Ulcer / Q000175:diagnosis / Q000191:economics / Q000453:epidemiology / Q000209:etiology; D012008:Recurrence; D012306:Risk