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
23% (24 votes)
Factor VIII and IX assay
11% (12 votes)
Factor XIII assay
40% (42 votes)
VWD profile
26% (28 votes)
Total votes: 106