title: Comparative data on the detection of hepatitis-B surface antigen by six centres.
mesh_terms: D003378:Counterimmunoelectrophoresis / Q000379:methods*; D006514:Hepatitis B Surface Antigens / Q000032:analysis*; D006801:Humans; D007122:Immunoelectrophoresis / Q000379:methods*; D007194:India; D014944:World Health Organization
chemical_list: D006514:Hepatitis B Surface Antigens