title: Comparative frequency of duodenal and gastric ulcers in Bombay.
mesh_terms: D003430:Cross-Sectional Studies; D004381:Duodenal Ulcer / Q000453:epidemiology*; D005260:Female; D006801:Humans; D007194:India; D008297:Male; D013276:Stomach Ulcer / Q000453:epidemiology*