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
20% (16 votes)
Factor IX
4% (3 votes)
Factor XI
8% (6 votes)
Factor XII
59% (47 votes)
Factor XIII
6% (5 votes)
Total votes: 80