title: von Willebrand factor in thrombotic thrombocytopenic purpura.
mesh_terms: D006680:HLA Antigens / Q000032:analysis; D006801:Humans; D010974:Platelet Aggregation; D011697:Purpura, Thrombotic Thrombocytopenic / Q000097:blood*; D014841:von Willebrand Factor / Q000032:analysis*
chemical_list: D006680:HLA Antigens; D014841:von Willebrand Factor