1. Advanced Nurse Practitioner, Haemophilia Treatment Center , Erasmus University Medical Centre , Rotterdam , The Netherlands .
2. Advanced Nurse Practitioner, Van Creveldkliniek , University Medical Center Utrecht , Utrecht , The Netherlands
3. Former Clinical Nurse Specialist, Hammersmith Hospital Haemophilia Centre, Imperial Healthcare NHS Trust , London , UK
4. Clinical Nurse Specialist, Department of Haemostasis , St George's University Hospital NHS Foundation Trust , London , UK
5. Department of Paediatrics, Division of Oncology and Haematology , Charité Universitätsmedizin Berlin , Germany