1.What are your main criteria for the selection of a VWF concentrate for the treatment of your patients with von Willebrand disease?

2.What factors could prevent you from using a pure VWF concentrate?

3.In patients with von Willebrand disease, what criteria do you use to assess whether the patient should be put on long-term prophylaxis or not?

Sports

Frequency of bleeds

Intensity of bleeds

Sex

Other (please specify)

4.Any differences between adult and paediatric patients?

5.- Before placing a patient on LTP, what PK parameters would you say are important for choosing the dose and frequency of injections?

VWF:RCo

VWF:Ag

FVIII:C

Other (please specify)