title: [A case of Willebrand's disease with abnormal factor IX (author's transl)].
mesh_terms: D002648:Child; D005164:Factor IX / Q000032:analysis*; D005260:Female; D006801:Humans; D007122:Immunoelectrophoresis; D014842:von Willebrand Diseases / Q000097:blood* / Q000235:genetics
chemical_list: D005164:Factor IX