Case: A 3-YOA female with normal PT and prolonged PTT and no bleeding. What is the most likely deficiency?

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Factor V
4% (3 votes)
Factor VIII
22% (16 votes)
Factor IX
3% (2 votes)
Factor XI
7% (5 votes)
Factor XII
58% (43 votes)
Factor XIII
7% (5 votes)
Total votes: 74