1. Department of Health Research, Methods, Evidence and Impact; McMaster University; Hamilton Ontario Canada
2. Department of Medicine; McMaster University; Hamilton Ontario Canada
3. Division of Hematology/Oncology; Hospital for Sick Children and Department of Pediatrics; University of Toronto; Toronto Ontario Canada
4. Department of Pediatric Hematology; University Hospital Brno; Brno Czech Republic
5. Arthur Bloom Haemophilia Centre; School of Medicine; University Hospital of Wales; Cardiff University; Cardiff UK
6. Van Creveldkliniek; University Medical Center; Utrecht the Netherlands
7. St Jude Children's Research Hospital; Memphis TN USA