title: Letter: Salivary HBAg detected by radioimmunoassay.
mesh_terms: D001769:Blood / Q000382:microbiology; D005260:Female; D006511:Hepatitis B Antigens / Q000302:isolation & purification*; D006801:Humans; D008107:Liver Diseases / Q000097:blood / Q000209:etiology / Q000276:immunology* / Q000382:microbiology; D008297:Male; D009780:Occult Blood; D011863:Radioimmunoassay; D012463:Saliva / Q000276:immunology*; D012725:Sexual Behavior
chemical_list: D006511:Hepatitis B Antigens