1. St. Anna Children's Hospital, Vienna Medical University, Vienna, Austria;
2. Department of General Pediatrics, Hematology/Oncology, University Children's Hospital, Tuebingen, Germany;
3. MBBM Foundation, Bone Marrow Transplantation Unit, Pediatric Department of Milano-Bicocca University, Monza, Italy;
4. Department of Haematology, EBMT Paris Study Office, Saint Antoine Hospital, Paris, France;
5. Department of Hematology, Hôpital Saint Louis, Paris, France;
6. Department for Haematology, University Hospital Basel, Basel, Switzerland;
7. Department of Hematology and Central Hematology Laboratory, Inselspital, Bern University Hospital, University of Bern;
8. Department of Hematology, Oncology, and Internal Diseases, Medical University of Warsaw, Warsaw, Poland;
9. Department of Hematology, University Hospital Leuven and KU Leuven, Leuven, Belgium;
10. Centre for Haematology, Imperial College London, London, UK