title: [Immunoradiometric assay of factor IX antigen using monoclonal antibody and classification of hemophilia B].
mesh_terms: D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology*; D005164:Factor IX / Q000276:immunology*; D002836:Hemophilia B / Q000145:classification*; D006801:Humans; D051379:Mice; D008807:Mice, Inbred BALB C; D011863:Radioimmunoassay / Q000379:methods*
chemical_list: D000911:Antibodies, Monoclonal; D005164:Factor IX