Kitchens, C S Discordance in a pair of identical twin carriers of factor IX deficiency. [electronic resource] - American journal of hematology Feb 1987 - 225-8 p. digital Publication Type: Case Reports; Journal Article ISSN: 0361-8609 Standard No.: 10.1002/ajh.2830240215 doi Subjects--Topical Terms: AdultDiseases in Twins--bloodDosage Compensation, GeneticFactor IX--analysisFemaleGenetic MarkersHemophilia B--bloodHumansInfant, NewbornPregnancyPregnancy Complications, Hematologic--bloodTwinsTwins, Monozygotic