1. Division of Hematology‐Oncology and Stem Cell Transplantation New Children's Hospital University of Helsinki and Helsinki University Hospital Helsinki Finland
2. Coagulation Disorders Unit Department of Hematology Comprehensive Cancer Center University of Helsinki and Helsinki University Hospital Helsinki Finland
3. Our Lady's Children's Hospital Dublin Ireland
4. Hämophiliezentrum Wabern and Children's Hospital of the University of Bern Bern Switzerland
5. Department of Women's and Children's Health Karolinska Institutet and Astrid Lindgren Children’s Hospital Karolinska University Hospital Stockholm Sweden