The relation between barometric pressure and the incidence of perforated duodenal ulcer.
D001274:Atmospheric Pressure; D003718:Denmark; D004381:Duodenal Ulcer / Q000150:complications*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010439:Peptic Ulcer Perforation / Q000453:epidemiology* / Q000209:etiology; D013276:Stomach Ulcer / Q000150:complications