title: Australia antigen: grouping the subsets.
mesh_terms: D000937:Antigen-Antibody Reactions; D000941:Antigens; D000939:Epitopes; D006515:Hepatitis B virus; D007519:Isoantigens; D011233:Precipitin Tests
chemical_list: D000941:Antigens; D000939:Epitopes; D007519:Isoantigens