title: Letter: HB Ag Y-subtypes in Iran.
mesh_terms: D002353:Carrier State / Q000276:immunology; D006505:Hepatitis / Q000276:immunology; D006511:Hepatitis B Antigens / Q000302:isolation & purification*; D006801:Humans; D007492:Iran
chemical_list: D006511:Hepatitis B Antigens