1. Pediatric Hematology/Oncology, Hannover Medical School, Hannover, Germany;
2. Pediatric Hematology/Oncology, University of Zurich, Zurich, Switzerland;
3. Department of Pediatrics, St. Anna Children’s Hospital and Children’s Cancer Research Institute, Medical University of Vienna, Vienna, Austria;
4. Department of Pediatric Hematology, Oncology, University of Essen, Essen, Germany;
5. Department of Pediatric Oncology and Hematology, Medical School, Saarland University, Homburg, Germany;
6. Pediatric Hematology, Oncology, and Hemostaseology, Children’s Hospital of the University of Frankfurt, Frankfurt/Main, Germany;
7. Department of Pediatric Hematology and Oncology, University Children’s Hospital, Münster, Germany;
8. Department of Pediatric Hematology/Oncology, University Children’s Hospital, Kiel, Germany;
9. Department of Pediatric Oncology/Hematology, Charité Universitätsmedizin Berlin, Berlin, Germany; and
10. Department of Pediatric Hematology and Oncology, Second Faculty of Medicine, Charles University and University Hospital Motol, Czech Pediatric Hematology Working Group, Prague, Czech Republic