title: Letter: Hepatitis B antigen in screened blood units.
mesh_terms: D001771:Blood Banks; D001782:Blood Donors; D006509:Hepatitis B / Q000209:etiology; D006511:Hepatitis B Antigens / Q000032:analysis*; D006801:Humans; D007122:Immunoelectrophoresis; D011863:Radioimmunoassay; D065227:Transfusion Reaction
chemical_list: D006511:Hepatitis B Antigens