1. Pediatric Hematology‐Oncology Unit, Kaplan Medical Center, Faculty of Medicine Hebrew University of Jerusalem Rehovot Israel
2. Division of Pediatric Hematology Oncology and Stem Cell Transplantation, Medical Faculty RWTH Aachen University Aachen Germany
3. SIREDO Oncology Center (Care, Innovation and Research for Children and AYA with Cancer) PSL Research University, Institut Curie Paris France
4. Pediatric Hematology and Oncology University Children's Hospital, Eberhard‐Karls‐Universitaet Tuebingen Germany
5. Pediatric Hematology and Oncology Unit Hospital Universitario de Cruces Barakaldo‐Bizkaia Spain
6. Department of Pediatric Oncology Oncology Institute “Prof. Dr. Al. Trestioreanu,” Bucharest Romania
7. Pediatric and Adolescents Oncology Clinic Children's Hospital MITERA Athens Greece
8. Pediatric Oncology Unit Fondazione IRCCS Istituto Nazionale dei Tumori Milan Italy
9. Gustave Roussy, Department of Pediatric Oncology Université Paris‐Saclay Villejuif France
10. Paris‐Saclay University, Paris‐Sud University Paris France
11. Hematology Oncology Division, Department of Woman's and Child's Health University of Padova Padova Italy
12. Clinic of Pediatrics Dortmund Municipal Hospital Dortmund Germany
13. Department of Pediatric Hematology and Oncology Félix Guyon University Hospital St. Denis Réunion Island France
14. Department of Pediatrics, Hematology and Oncology Medical University of Gdansk Gdansk Poland
15. Department of Pediatric Hematology and Oncology, The Queen Silvia Children's Hospital Sahlgrenska University Hospital Gothenburg Sweden
16. Department of Oncology Hadassah Hebrew University Medical Center Jerusalem Israel
17. Department of Radiation Oncology University Medical Center Utrecht Utrecht The Netherlands
18. Princess Maxima Center for Pediatric Oncology Utrecht The Netherlands
19. Department of Nuclear Medicine Institut Curie Paris France
20. Department of Radiology Institut Curie Paris University Paris France
21. Pediatric Radiotherapy Unit Fondazione IRCCS Istituto Nazionale dei Tumori Milan Italy
22. Department of Radiation Oncology Hannover Medical School Hanover Germany
23. Department of Radiation Oncology Léon Bérard Center Lyon France
24. St. Jude Children's Research Hospital Memphis Tennessee USA