title: Serum hepatitis with "masked" Australia antigen.
mesh_terms: D000328:Adult; D006509:Hepatitis B / Q000276:immunology*; D006511:Hepatitis B Antigens; D006515:Hepatitis B virus / Q000276:immunology*; D006801:Humans; D008297:Male; D008722:Methods
chemical_list: D006511:Hepatitis B Antigens