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血友病(因子Ⅷ缺乏症和因子Ⅸ缺乏症)分为先天性和获得性二类。前者系性联隐性遗传,后者多为
Hemophilia (factor Ⅷ deficiency and factor Ⅸ deficiency) is divided into congenital and acquired two categories. The former is associated with recessive inheritance, the latter mostly