Incidence of perforated duodenal and gastric ulcer in Oxford.
D000017:ABO Blood-Group System; D000328:Adult; D000375:Aging; D004381:Duodenal Ulcer / Q000453:epidemiology; D004739:England; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010439:Peptic Ulcer Perforation / Q000453:epidemiology* / Q000401:mortality; D012723:Sex; D013276:Stomach Ulcer / Q000453:epidemiology
D000017:ABO Blood-Group System