1. Department of Haematology; VU University Medical Centre; Amsterdam The Netherlands
2. Department of Paediatric Oncology/Haematology; VU University Medical Centre; Amsterdam The Netherlands
3. Paediatric Oncology and Haematology; AML-BFM Study Group; Medical School Hannover; Hannover Germany
4. Paediatric Oncology/Haematology; ErasmusMC/ Sophia Children's Hospital; Rotterdam The Netherlands
5. Department of Paediatric Oncology/Haematology; University Medical Centre Groningen; University of Groningen; Groningen The Netherlands
6. Department of Paediatric Haematology-Oncology; Schneider Children's Medical Centre; Petah-Tikva Israel
7. Department of Paediatric Haematology-Oncology; University of Milano-Bicocca; Monza Italy
8. Dutch Childhood Oncology Group; The Hague The Netherlands