1. UCL Institute of Child Health, London, UK
2. Theodor-Boveri-Institute/Biocenter, Developmental Biochemistry and Comprehensive Cancer Center Mainfranken, Wuerzburg University, Wuerzburg, Germany
3. Institute of Cancer Research, Sutton, Surrey, UK
4. Cardiff University School of Medicine, Heath Park, Cardiff, UK
5. Biometrics Department, Netherlands Cancer Institute, Antonie van Leeuwenhoek Ziekenhuis, Amsterdam, The Netherlands
6. Department of Pediatric Oncology/Hematology, Erasmus MC, Sophia Children's Hospital, Rotterdam, The Netherlands
7. German Cancer Research Centre, Heidelberg, Germany
8. Academic Medical Center, Amsterdam, The Netherlands
9. Department of Clinical Genetics, Lund University, Sweden
10. Department of Paediatric Oncology and Haematology, Saarland University Hospital, Homburg/Saar, Germany