title: Evolution of ABH blood group antigens during embryogenesis.
authors.affiliation: Magee Women's Hospital, University of Pittsburgh, PA.
authors.forename: A E
authors.initials: AE
authors.lastname: Szulman
mesh_terms: D000017:ABO Blood-Group System; D000954:Antigens, Surface; D004622:Embryo, Mammalian / Q000276:immunology*; D004848:Epithelium / Q000276:immunology; D005865:Gestational Age; D006801:Humans; D007108:Immune Tolerance
chemical_list: D000017:ABO Blood-Group System; D000954:Antigens, Surface