1. Department of Pediatrics, Hematology and Oncology, Medical University Gdansk Poland
2. Department of Pediatric Surgery Hôpital Necker‐Enfants Malades, Université de Paris Paris France
3. Paediatric Oncology Unit Fondazione IRCCS Istituto Nazionale dei Tumori Milan Italy
4. Thoraco‐Pulmonary Medical Oncology Unit, Medical Oncology and Hematology Department Fondazione IRCCS Istituto Nazionale dei Tumori Milan Italy
5. Department of Cancer Medicine Gustave Roussy Villejuif France
6. Department of Pediatric Surgery University of Caen Hospital Caen France
7. Pediatric Surgery, Department of Women's and Children's Health University of Padua Padua Italy
8. Clinic of Pediatrics Dortmund Municipal Hospital Dortmund Germany
9. Pediatric Oncology and Hematology, Children's Hospital Eberhard‐Karls‐Universitaet Tuebingen Germany
10. Pediatric Hematology Unit Kaplan Medical Center Rehovot Israel
11. Department of Pediatric Hematology and Oncology Félix Guyon University Hospital Réunion Island Saint‐Denis France
12. Department of Pediatric Surgery Marciniak Hospital Wroclaw Poland
13. Department of Pediatric Traumatology and Emergency Medicine Wroclaw Medical University Wroclaw Poland
14. Hematology and Oncology Division, Department for Women's and Children's Health Padua University Padua Italy
15. SIREDO Oncology Center (Care, Innovation and Research for Children, Adolescents and Young Adults with Cancer) Institut Curie, PSL University Paris France