ABO blood groups in gastric bleeding.
D000017:ABO Blood-Group System; D000328:Adult; D001241:Aspirin / Q000009:adverse effects; D001789:Blood Group Antigens; D004381:Duodenal Ulcer / Q000097:blood; D005260:Female; D005753:Gastric Mucosa / Q000187:drug effects; D006471:Gastrointestinal Hemorrhage; D006396:Hematemesis / Q000378:metabolism; D006801:Humans; D008297:Male; D008551:Melena / Q000378:metabolism
D000017:ABO Blood-Group System; D001789:Blood Group Antigens; D001241:Aspirin