The latest VWD diagnosis guidelines [15] recommend assigning type 1 VWD to individuals with VWF levels <30 U/dL, with concordant VWF activity/Ag ratio, and to those with VWF levels between 30 and 50 U/dL, concordant VWF activity/Ag ratio, and appropriate clinical history. Here, VWF is linked to von Willebrand disease (hereditary or acquired).