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

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Platelet function abnormality
13% (10 votes)
Von Willebrand disease
18% (14 votes)
Factor VII deficiency
5% (4 votes)
Factor XII deficiency
5% (4 votes)
Factor XIII deficiency
51% (39 votes)
Other: please provide a written response
8% (6 votes)
Total votes: 77