1. Princess Máxima Center for Pediatric Oncology Utrecht the Netherlands
2. Department of Genetics University Medical Center Utrecht/Wilhelmina Children's Hospital Utrecht the Netherlands
3. Department of Pediatric Oncology Centre Oscar Lambret Lille France
4. Department of Pediatric Oncology Hospital Universitario Virgen del Rocío Seville Spain
5. Great Ormond Street Institute of Child Health University College London London United Kingdom
6. Department of Pediatric Oncology Rigshospitalet Copenhagen Denmark
7. Department of Pediatric Oncology Karolinska University Hospital Solna Sweden
8. Department of Pediatric Oncology Institut Curie Hospital Paris France
9. Department of Pediatrics and Adolescent Medicine Friedrich‐Alexander University Erlangen‐Nürnberg Erlangen Germany
10. Pediatric Hematology‐Oncology Program Instituto Nacional de Cancer Rio de Janeiro Brazil
11. Department of Pediatric Oncology University Children's Hospital Ljubljana Slovenia
12. Department of Hemato‐Oncology Mother and Child Health Care Institute of Serbia Belgrade Serbia
13. Pediatric Oncology Instituto Nacional de Enfermedades Neoplásicas Lima Peru
14. Department of Pediatric Hemato‐Oncology University Hospital Leuven Leuven Belgium
15. Department of Pathology Sidra Medicine Doha Qatar
16. Department of Biometrics Netherlands Cancer Institute Amsterdam the Netherlands
17. Institut d'Hematologie et d'Oncologie Pédiatrique Centre Léon Bérard Lyon France
18. Department of Pediatric Oncology and Hematology Saarland University Homburg Germany