title: Susceptibility to peptic ulcer and blood group substances.
mesh_terms: D000017:ABO Blood-Group System; D001789:Blood Group Antigens; D005750:Gastric Juice / Q000378:metabolism; D005826:Genetics, Medical; D006023:Glycoproteins; D006025:Glycosaminoglycans; D006801:Humans; D009093:Mucus; D010437:Peptic Ulcer / Q000235:genetics*
chemical_list: D000017:ABO Blood-Group System; D001789:Blood Group Antigens; D006023:Glycoproteins; D006025:Glycosaminoglycans