[Gastric and duodenal ulcer and the principal blood groups].
D000017:ABO Blood-Group System; D004381:Duodenal Ulcer / Q000453:epidemiology*; D005260:Female; D006801:Humans; D008297:Male; D013276:Stomach Ulcer / Q000453:epidemiology*
D000017:ABO Blood-Group System
Choroba wrzodowa zolådka i dwunastnicy a glówne grupy krwi.