title: Letter: Hepatitis-B antigen on environmental surfaces.
mesh_terms: D001800:Blood Specimen Collection; D002353:Carrier State / Q000209:etiology*; D004777:Environment; D006509:Hepatitis B / Q000209:etiology*; D006511:Hepatitis B Antigens / Q000302:isolation & purification*; D006801:Humans; D007688:Kidneys, Artificial; D011863:Radioimmunoassay; D006435:Renal Dialysis
chemical_list: D006511:Hepatitis B Antigens