1. U.O.C. EmatologiaU.O.S. Fisiopatologia delle Anemie, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico Milan Italy
2. Department of PediatricsYale University School of Medicine New Haven CT
3. Division Internal Medicine and DermatologyVan Creveldkliniek, University Medical Center Utrecht Utrecht The Netherlands
4. Central Pennsylvania Clinic for Special Children & AdultsBelleville, PA; Lancaster General Hospital Lancaster PA
5. Lucile Packard Children's HospitalStanford University Palo Alto CA
6. Department of PediatricsEmory University School of Medicine, Aflac Cancer and Blood Disorders Center, Children's Healthcare of Atlanta Atlanta GA
7. School of MedicinePediatrics, Children's Hospital of Michigan, Wayne State University School of Medicine Detroit MI
8. Department of PediatricsUniversity of Massachusetts Medical School Worcester MA
9. Department of Pediatric Hematology/OncologyKlinikum Kassel GmbH Kassel Germany
10. Texas Children's Hematology CenterBaylor College of Medicine Houston TX
11. Department of MedicineMcMaster University Hamilton, ON Canada
12. Department of PediatricsChildren's Mercy, School of Medicine University of Missouri Kansas City MO
13. Division of HematologyChildren's Hospital of Philadelphia, and Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania Philadelphia PA
14. Division of Hematology, Department of MedicineUniversity Health Network, University of Toronto Toronto Ontario Canada
15. St. Jude Children's Research Hospital Memphis TN
16. Primary Children's HospitalUniversity of Utah Salt Lake City UT
17. CharitéUniversity Medicine, Pediatric Hematology and Oncology Berlin Germany
18. DDC Clinic for Special Needs Children Middlefield OH
19. Zentrumfür Kinder‐und Jugendmedizin Heidelberg Germany
20. Dana‐Farber/Boston Children's Cancer and Blood Disorder Center Boston MA
21. Department of PediatricsUniversity of Würzburg Würzburg Germany
22. Central Diagnostic LaboratoryUniversity Medical Center Utrecht Utrecht The Netherlands
23. Department of Pediatrics, Department of Genetics, Department of PathologyYale University School of Medicine New Haven CT