1. Department of Pediatrics and Pediatric Oncology Center, Klinikum rechts der Isar der Technischen Universität München, Munich, Germany
2. Institute for Medical Statistics and Epidemiology, Klinikum rechts der Isar der Technischen Universität München, Munich, Germany
3. Pediatric Hematology and Oncology, Children’s Hospital III, Johann Wolfgang Goethe University, Frankfurt, Germany
4. Department of Pediatric Oncology, Hematology and Clinical Immunology, Heinrich Heine University Düsseldorf, Germany
5. Department of Hematology and Oncology, University Children’s Hospital, Tübingen, Germany
6. Department of Pediatric Hematology and Oncology, University Children’s Hospital, Würzburg, Germany
7. Department of Pediatrics, University Hospital of Jena, Germany
8. Internal Medicine I, University Hospital Carl Gustav Carus, Dresden, Germany
9. Pediatric 5 (Oncology, Hematology, Immunology), Olga Hospital, Klinikum Stuttgart, Germany
10. Department of Pediatric Hematology/Oncology, Dr. von Hauner Children’s Hospital, Ludwig-Maximilians-University, Munich, Germany
11. Department of Pediatric Hematology/Oncology, Hannover Medical School, Hannover, Germany
12. Department of Hematology and Oncology, University of Regensburg, Germany
13. Clinic and Policlinic for Children and Adolescents, Medical Center Martin-Luther-University of Halle/Wittenberg, Halle/Saale, Germany
14. Department of Pediatric Hematology and Oncology, University Hospital, Giessen, Germany
15. DKMS German Bone Marrow Donor Center, Tübingen, Germany
16. Stem Cell Transplantation Unit, St. Anna Children’s Hospital, Vienna, Austria
17. Department of Pediatric Hematology and Oncology, University Children’s Hospital Münster, Germany
18. Unit of Medical Hematology-Oncology, Ospedale di Circolo, Busto Arsizio, Italy