title: Letter: Absence of HBsAg and anti-HBs in spinal fluid.
mesh_terms: D002353:Carrier State; D002555:Cerebrospinal Fluid / Q000276:immunology*; D006386:Hemagglutination Tests; D006509:Hepatitis B / Q000134:cerebrospinal fluid / Q000382:microbiology; D006510:Hepatitis B Antibodies / Q000302:isolation & purification; D006511:Hepatitis B Antigens / Q000302:isolation & purification*; D006515:Hepatitis B virus / Q000276:immunology; D006801:Humans; D011863:Radioimmunoassay
chemical_list: D006510:Hepatitis B Antibodies; D006511:Hepatitis B Antigens