A 25-YO experienced chronic soft tissue bleeding and poor wound healing. His PT, PTT, and PLT count were normal. What follow-up assay is indicated?

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Platelet aggregometry
27% (20 votes)
Factor VIII and IX assay
9% (7 votes)
Factor XIII assay
41% (30 votes)
VWD profile
23% (17 votes)
Total votes: 74