<prompt> Which of the following is not true regarding Von Willebrand disease?Normal platelet countQuantitative defects are seen in subtypes 1 and 3 von Willebrand diseaseHemahrosis is the usual presentationProduced by endothelial cells  <response>: VWD characterized by functional defect in the platelets but normal platelet count Reduced functional half-life of clotting factor VIII VWD has three subtypes I IIIII I and III subtypes characterized by deficiency of Von Willebrand factorquantitative problem Subtype II is characterized by functional defect of von Willebrand factor because of genetic mutation Mucus membrane bleeding is seen in patients 