1. Van Creveldkliniek, Department of Hematology and
2. Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, The Netherlands;
3. Department of Clinical Sciences, Malmö, Lund University, Skåne University Hospital, Malmö, Sweden;
4. Department of Paediatrics and
5. Coagulation Unit, Karolinska University Hospital, Stockholm, Sweden;
6. Lund University, Department of Paediatrics, Malmö/Lund, Sweden; and
7. Malmö Centre for Thrombosis and Haemostasis, Skåne University Hospital, Malmö, Sweden