title: Patients with hemophilia B (Christmas disease) who have anti-factor IX: genetic heterogeneity.
authors.forename: M C
authors.initials: MC
authors.lastname: Poon
mesh_terms: D002872:Chromosome Deletion; D005164:Factor IX / Q000235:genetics / Q000276:immunology*; D002836:Hemophilia B / Q000235:genetics / Q000276:immunology*; D006801:Humans; D014960:X Chromosome
chemical_list: D005164:Factor IX