1. Paediatric Haematology/Oncology; Hospital for Sick Children and University of Toronto; Toronto Canada
2. Paediatric Haematology/Oncology; Great Ormond Street Hospital and UCL Institute of Child Health; London UK
3. Studies and Statistics on Integrated Research and Projects; St Anna Kinderkrebsforschung; Vienna Austria
4. Paediatric Haematology/Oncology; Hospital Nino Jesús; Madrid Spain
5. Paediatric Haematology/Oncology; Agia Sofia Children's Hospital; Athens Greece
6. Paediatric Haematology/Oncology; Our Lady's Children's Hospital; Crumlin Dublin Ireland
7. Paediatric Haematology/Oncology; Schneider Children's Medical Center of Israel; Petah Tikva Israel
8. Department of Paediatric and Adolescent Oncology; Institut Gustav Roussy; Viellejuif France
9. Dipartimento di Ematologia e Onco-ematologia Pediatrica; Fondazione IRCCS Istituto Nazionale dei Tumori; Milan Italy
10. Paediatric Oncology; Istituto Giannia Gaslini; Genova Italy
11. Pediatric Oncology Unit; Hospital Universitario y Politecnico La Fe; Valencia Spain
12. Paediatric Oncology; Leeds Teaching Hospital NHS Trust; Leeds UK
13. Department of Pediatric Oncology and Hematology; Institute of Pediatrics; Jagiellonian University Medical College; Krakow Poland
14. Department of Pediatric Hematology/Oncology and Stem Cell Transplantation University Hospital Ghent; Ghent Belgium
15. Department of Women's and Children's Health, Karolinska Institutet; Astrid Lindgren Children's Hospital; Karolinska University Hospital; Stockholm Sweden
16. Department of Pediatric Hematology and Oncology; University Hospital Motol; Prague Czech Republic
17. Department of Paediatric Medicine; Rikshospitalet; Oslo University Hospital; Oslo Norway
18. Department of Pediatrics and Pediatric Surgery; Pediatric Haematology Oncology Unit; University Hospital Lausanne; Lausanne Switzerland
19. Department of Paediatrics; Institut Curie; Paris France
20. Paediatric Haematology/Oncology; St Anna Kinderspital and St Anna Kinderkrebforschung; Vienna Austria