title: Letter: HBAg on liver-cell surface in viral hepatitis.
mesh_terms: D000208:Acute Disease; D001706:Biopsy; D002462:Cell Membrane / Q000276:immunology; D002908:Chronic Disease; D005455:Fluorescent Antibody Technique; D006506:Hepatitis A / Q000276:immunology*; D006511:Hepatitis B Antigens / Q000302:isolation & purification*; D006801:Humans; D007106:Immune Sera; D008099:Liver / Q000166:cytology / Q000276:immunology*
chemical_list: D006511:Hepatitis B Antigens; D007106:Immune Sera