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Hemophilia B

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Hemophilia B (also spelt Hæmophilia B or Haemophilia B) is a blood clotting disorder caused by a mutation of the Factor IX[?] gene. See haemophilia.

External Link

http://www.yourgenesyourhealth.org/ygyh/mason/ygyh?syndrome=hemo§ion=whatisit&video=0

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