title: Hepatitis B antigen in pleural effusion and ascitic fluids.
mesh_terms: D000368:Aged; D001202:Ascitic Fluid / Q000276:immunology*; D005260:Female; D006505:Hepatitis / Q000276:immunology; D006514:Hepatitis B Surface Antigens / Q000302:isolation & purification*; D006801:Humans; D010996:Pleural Effusion / Q000276:immunology*
chemical_list: D006514:Hepatitis B Surface Antigens