1. Department of Pediatrics, University Medical Center Schleswig-Holstein, Campus Kiel, Kiel, Germany
2. Department of Pediatric Hematology and Oncology, University Children's Hospital, Giessen, Germany
3. Department of Pediatric Hematology and Oncology, Charité, Humboldt University, Berlin, Germany
4. Department of Pediatric Hematology and Oncology, Medizinische Hochschule, Hannover, Germany
5. Department of Pediatrics, St. Anna Kinderspital, Vienna, Austria
6. Department. of Hematology, Oncology, and Tumor Immunology, Robert-Rössle-Clinic, HELIOS Medical Center Berlin-Buch, Germany
7. Department of Pediatric Hematology and Oncology, University Children's Hospital, Münster, Germany
8. Oncogenetic Laboratory, University Children's Hospital, Giessen, Germany
9. Department of Pediatric Hematology and Oncology, University Children's Hospital, Frankfurt, Germany
10. Department of Pediatric Hematology and Oncology, University Children's Hospital, Jena, Germany
11. Department of Pediatric Hematology and Oncology, University Children's Hospital, Freiburg, Germany
12. Department of Pediatric Hematology and Oncology, University Children's Hospital, Essen, Germany
13. Department of Pediatric Hematology and Oncology, University Children's Hospital, Zürich, Switzerland
14. Department of Pediatric Hematology and Oncology, University Children's Hospital, Ulm, Germany