1. Department of Pediatric Hematology-Oncology, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Ospedale Pediatrico Bambino Gesù, Rome, Italy;
2. University of Pavia, Pavia, Italy;
3. Eurocord, Hôpital Saint Louis, Paris, France;
4. Hematology Oncology and Bone Marrow Transplant Department, Shariati Hospital, Tehran, Iran;
5. Hematology Department, Hammersmith Hospital, London, United Kingdom;
6. Pediatric Department, Prince of Wales Hospital, Shatin, Hong Kong;
7. Reference Center for Sickle Cell Disease, Intercommunal Hospital, Créteil, France;
8. Pediatric Hematology and Oncology Department, Cliniques Universitaires Saint-Luc, Brussels, Belgium;
9. Pediatric Hematology Department, Hôpital Robert Debré, Paris, France;
10. Bone Marrow Transplantation Unit, Schneider Children’s Medical Center of Israel, Petach-Tikva, Israel;
11. Royal Manchester Children’s Hospital, Manchester, United Kingdom;
12. Hematology Department, Hôpital Henri Mondor, Créteil, France;
13. EBMT Hemoglobinopathy Registry;
14. Hematology-Bone Marrow Transplantation Department, Hôpital Saint Louis, Paris, France;
15. Blood and Marrow Transplant Program, Children’s Hospital and Research Center, Oakland, CA; and
16. Haematology Department, Bone Marrow Transplant Unit, University of Oxford, Oxford, United Kingdom