Please refer to our 1-1-19 case. What is the boy's most likely hemostasis deficiency?

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Platelet function abnormality
15% (10 votes)
Von Willebrand disease
19% (13 votes)
Factor VII deficiency
4% (3 votes)
Factor XII deficiency
4% (3 votes)
Factor XIII deficiency
52% (35 votes)
Other: please provide a written response
4% (3 votes)
Total votes: 67