Type 2A von Willebrand disease ( VWD ) is characterized by decreased platelet-dependent function of von Willebrand factor ( VWF ) ; this in turn is associated with an absence of high-molecular-weight multimers .
B-DiseaseOrPhenotypicFeature I-DiseaseOrPhenotypicFeature I-DiseaseOrPhenotypicFeature I-DiseaseOrPhenotypicFeature I-DiseaseOrPhenotypicFeature O B-DiseaseOrPhenotypicFeature O O O O O O O O B-GeneOrGeneProduct I-GeneOrGeneProduct I-GeneOrGeneProduct O B-GeneOrGeneProduct O O O O O O O O O O O O O O