1. Department of Clinical Epidemiology Leiden University Medical Center Leiden the Netherlands
2. Department of Pathophysiology and Transplantation University of Milan Milan Italy
3. Angelo Bianchi Bonomi Haemophilia and Thrombosis Centre and Luigi Villa Foundation Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico Milan Italy
4. Pediatric Hematology Department Cairo University Pediatric Hospital Cairo Egypt
5. Department of Pediatrics Faculty of Medicine Ain Shams University Cairo Egypt
6. Department of Hematology Jehangir Clinical Development Centre Jehangir Hospital Premises Pune India
7. Congenital Pediatric Hematologic Disorders Research Center Shahid Beheshti University of Medical Sciences Tehran Iran
8. Hematology Research Center Shiraz University of Medical Sciences Shiraz Iran
9. Pediatric Hematology Emma Children's Hospital Amsterdam University Medical Center Amsterdam the Netherlands