title: Quantitation of hepatitis-associated antigen with a modified Ouchterlony precipitin test.
mesh_terms: D006467:Hemophilia A / Q000276:immunology; D006506:Hepatitis A / Q000276:immunology; D006511:Hepatitis B Antigens; D006515:Hepatitis B virus / Q000276:immunology*; D006801:Humans; D005779:Immunodiffusion; D008722:Methods; D013997:Time Factors
chemical_list: D006511:Hepatitis B Antigens