Affiliation: | 1. Division of Paediatric Haematology, Oncology and Stem Cell Transplantation, Department of Paediatrics and Adolescent Medicine, University Medical Centre, Aachen, Germany;2. Department of Pathology, Haematopathology Section and Lymph Node Registry, University of Kiel, Kiel, Germany;3. Department of Paediatric Haematology and Oncology, NHL‐BFM‐Study Centre, Justus Liebig University, Giessen, Germany;4. Department of Paediatric Haematology and Oncology, NHL‐BFM‐Study Centre, University Children's Hospital, Münster, Germany;5. Department of General Paediatrics, University Medical Centre Schleswig‐Holstein, Kiel, Germany;6. Centre for Paediatrics and Adolescent Medicine, University Medical Centre, Freiburg, Germany;7. Department of Paediatric Haematology and Oncology, St. Anna Children's Hospital, Vienna, Austria;8. Department of Paediatrics and Adolescent Medicine, Medical University of Vienna, Vienna, Austria;9. Department of Paediatric Haematology and Oncology, University Children's Hospital Zürich, Zürich, Switzerland;10. Department of Paediatric Haematology and Oncology, Medical School Hannover, Hannover, Germany |