Influence of the ABO blood groups and secretor status on bleeding and on perforation of duodenal ulcer.
D000017:ABO Blood-Group System; D004381:Duodenal Ulcer; D005260:Female; D006801:Humans; D008297:Male; D008595:Menorrhagia; D010438:Peptic Ulcer Hemorrhage; D010439:Peptic Ulcer Perforation; D012463:Saliva
D000017:ABO Blood-Group System