title: Further studies on factor IX antigen in hemophilia B.
mesh_terms: D000941:Antigens / Q000032:analysis*; D000939:Epitopes; D005164:Factor IX / Q000276:immunology*; D002836:Hemophilia B / Q000276:immunology*; D006801:Humans; D008722:Methods
chemical_list: D000941:Antigens; D000939:Epitopes; D005164:Factor IX