title: Letter: HBsAg on cell membrane in symptom-free carrier.
mesh_terms: D002353:Carrier State; D002462:Cell Membrane / Q000276:immunology; D006509:Hepatitis B / Q000276:immunology*; D006511:Hepatitis B Antigens / Q000302:isolation & purification*; D006801:Humans; D008099:Liver / Q000276:immunology*; D008107:Liver Diseases / Q000276:immunology
chemical_list: D006511:Hepatitis B Antigens