Large-scale blood-screening program for hepatitis B.
D001782:Blood Donors; D003378:Counterimmunoelectrophoresis; D006511:Hepatitis B Antigens / Q000032:analysis*; D006801:Humans; D007753:Laboratories / Q000592:standards; D009518:New York; D011863:Radioimmunoassay
D006511:Hepatitis B Antigens