1. Klinik fuer Kinder-und Jugendmedizin III, Johann Wolfgang Goethe Universitaet, Frankfurt, Germany;
2. Hospital for Sick Children, Bristol, United Kingdom;
3. Acute Leukemia Working Party, EBMT-Paris Office, Hopital Saint Antoine Assistance Publique–Hôpitaux de Paris (AP-HP), Université Pierre et Marie Curie Paris 6, Inserm U832, Paris, France;
4. Paediatric Haematology-Oncology, Fondazione Istituti di ricovero e cura a carattere scientifico (IRCCS) Policlinico San Matteo, Università di Pavia, Pavia, Italy;
5. Department of Haematology, Birmingham Children's Hospital, Birmingham, United Kingdom;
6. Universitätskinderklinik Tübingen, Department for Pediatric Hematology and Oncology, Tübingen, Germany;
7. Clinica Pediatrica dell'Università degli Studi di Milano Bicocca, Ospedale San Gerardo Monza, Milan, Italy;
8. Hematology Oncology Pediatrics Department, Wroclaw Medical University Hospital, Wroclaw Poland;
9. Dipartimento di Scienze Pediatriche e dell'Adolescenza, Università degli Studi di Torino, Torino, Italy;
10. Department of Pediatrics, Hadassah University Hospital, Ein Kerem, Jerusalem, Israel;
11. St Anna Kinderspital, Vienna, Austria;
12. Division of Hematology and Clinical Immunology, HSCT Unit and Pediatric Hematology/Oncology, University of Perugia, Istituto di Ricovero e Cura a Carattere Scientifico, Perugia, Italy;
13. Department of Pediatric Hematology/Oncology, G. Gaslini Children's Research Institute, Genova, Italy; and
14. Clinical Research and HSCT Unit, Hopital Saint Louis–AP-HP, Université Paris 7, Paris, France