Seasonal variation in the incidence of peptic ulcera perforations.
D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D007194:India; D008297:Male; D008875:Middle Aged; D010439:Peptic Ulcer Perforation / Q000453:epidemiology*; D012621:Seasons; D014329:Tropical Climate