title: Early observations about the ABO blood groups.
authors.affiliation: Duke University Medical Center, Durham, North Carolina, USA.
authors.forename: F K
authors.initials: FK
authors.lastname: Widmann
mesh_terms: D000017:ABO Blood-Group System / Q000266:history*; D049673:History, 20th Century
chemical_list: D000017:ABO Blood-Group System