title: Letter: Seroepidemiology of hepatitis-B infections.
mesh_terms: D006510:Hepatitis B Antibodies / Q000302:isolation & purification; D006511:Hepatitis B Antigens / Q000302:isolation & purification; D006515:Hepatitis B virus / Q000276:immunology*; D006801:Humans; D011863:Radioimmunoassay / Q000379:methods
chemical_list: D006510:Hepatitis B Antibodies; D006511:Hepatitis B Antigens