title: A, B or O: what's the difference?
mesh_terms: D000017:ABO Blood-Group System; D001666:Binding Sites, Antibody; D000939:Epitopes; D005796:Genes; D006801:Humans; D007519:Isoantigens; D009005:Monosaccharides; D009844:Oligosaccharides
chemical_list: D000017:ABO Blood-Group System; D000939:Epitopes; D007519:Isoantigens; D009005:Monosaccharides; D009844:Oligosaccharides