[Ratio of the incidence of ulcer localizations in the stomach and the pyloroduodenal zone].
D000328:Adult; D000368:Aged; D001136:Armenia; D004381:Duodenal Ulcer / Q000453:epidemiology*; D006801:Humans; D008875:Middle Aged; D011708:Pylorus; D012800:Siberia; D013276:Stomach Ulcer / Q000453:epidemiology*
O sootnoshenii chastoty lokalizatsiĭ iazv zheludka i piloroduodenal'noĭ zony.