1. Coagulation Unit; Haematology Centre; Karolinska University Hospital and Karolinska Institutet; Stockholm Sweden
2. Department of Haematology and Coagulation; Skåne University Hospital; Malmö Sweden
3. Department of Medicine and Haematology; Karolinska Institutet; Karolinska University Hospital Huddinge; Stockholm Sweden
4. Department of Orthopedics; Karolinska University Hospital and Karolinska Institutet; Stockholm Sweden
5. Agency for Haemophilia; Department of Emergency & Reception; Azienda Ospedaliero-Universitaria Careggi; Firenze Italy
6. Department of Clinical and Experimental Medicine; Division of Rheumatology University of Florence; Florence Italy