VWD: von Willebrand disease; VWF: von Willebrand factor; VWF:Ag: von Willebrand factor antigen; FVIII: factor VIII; RIPA: ristocetin-induced platelet aggregation.
* VWF activity is measured using one of several assays including:ΒΆ Less commonly, cases of type 2B may have a normal multimer distribution.