title: Practical problems for HBSAg subtyping.
mesh_terms: D000917:Antibody Formation; D002213:Capsid / Q000276:immunology; D000939:Epitopes; D006510:Hepatitis B Antibodies; D006511:Hepatitis B Antigens / Q000145:classification*; D005779:Immunodiffusion; D007122:Immunoelectrophoresis; D007123:Immunoelectrophoresis, Two-Dimensional; D011863:Radioimmunoassay; D012703:Serotyping
chemical_list: D000939:Epitopes; D006510:Hepatitis B Antibodies; D006511:Hepatitis B Antigens