title: Letter: Haemophilia-B carriers.
mesh_terms: D000941:Antigens / Q000302:isolation & purification; D005164:Factor IX / Q000302:isolation & purification; D005260:Female; D002836:Hemophilia B / Q000175:diagnosis / Q000235:genetics*; D006801:Humans
chemical_list: D000941:Antigens; D005164:Factor IX