Also, vitamin K deficiency can cause hemophilia since vitamin K is needed by the liver to synthesize and release factors II, VII, IX, and X.

并且维生素K缺乏症也可引起血友病，因为维生素K参与肝脏合成及释放因子II、VII、IX和X。

I still don't buy a vitamin " K" Deficiency.

我依然不觉得是维生素K缺乏症。

The prolonged PT time makes me think she's got a vitamin K deficiency.

延长的凝血时间让我认为她患有维生素" K" 缺乏。