1. Department of Internal Medicine; Hemophilia Care Center Heidelberg; SRH Kurpfalzkrankenhaus; Heidelberg Germany
2. Hemostasis Unit; University Hospitals and Faculty of Medicine of Geneva; Geneva Switzerland
3. Department of Hematology; Van Creveldkliniek; University Medical Center Utrecht; Utrecht The Netherlands
4. Department of Haematology; Queens Medical Centre; Nottingham University Hospitals; Nottingham UK