1. Department of Pathology; Boston Children's Hospital; Boston Massachusetts
2. Department of Medical Genetics; University Medical Centre; Utrecht Utrecht The Netherlands
3. Division of Genetics and Genomics; Boston Children's Hospital; Boston Massachusetts
4. Department of Medicine; Boston Children's Hospital; Boston Massachusetts
5. Department of Haematology; Cardiff University School of Medicine; Heath Park Cardiff Wales
6. Division of Hematology; Boston Children's Hospital; Boston Massachusetts
7. Department of Genetics; Radboud University Medical Centre; Nijmegen The Netherlands
8. Laboratoire de Génétique Moléculaire, Unité fonctionnelle de génétique, Hôpital Xavier Bichat-Claude Bernard, Université Paris Diderot; insermU773 Paris France
9. Pediatric Hematology and Oncology Department, Children's Hospital; University of Freiburg; Freiburg Germany
10. NGH NHS Trust; Northampton General Hospital; Clifton Ville Northampton England
11. Department of Haematology; Ninewells Hospital; Dundee Scotland
12. Department of Clinical Chemistry and Haematology; University Medical Centre Utrecht; Utrecht The Netherlands
13. Department of Haematology; University Medical Centre; Utrecht Utrecht the Netherlands
14. Department of Medicine; Hematology-Oncology Section; University of Oklahoma College of Medicine; Oklahoma Oklahoma
15. Department of Laboratory Medicine; Radboud University Medical Centre; Nijmegen The Netherlands