1. Department of Pediatrics, Hematology and Oncology Medical University of Gdansk Gdansk Poland
2. Department of Pediatrics, Clinical Hospital Center Rijeka University of Rijeka Rijeka Croatia
3. Department of Pediatric Surgery Marciniak Hospital Wroclaw Poland
4. Department of Pediatric Traumatology and Emergency Medicine Wroclaw Medical University Wroclaw Poland
5. SIREDO Oncology Center (Care, Innovation and Research for Children and AYA with Cancer) PSL Research University, Institut Curie Paris France
6. Pediatric Surgery, Department of Women's and Children's Health University of Padua Padua Italy
7. Pediatric Surgery Universitaetsmedizin Greifswald Greifswald Germany
8. Centre Oscar Lambret Lille France
9. Pediatric Oncology Unit Fondazione IRCCS Istituto Nazionale dei Tumori Milan Italy
10. Departments of Surgery, Oncology and Anesthesiology, Boston Children's Hospital Dana‐Farber Cancer Institute, Harvard University Boston Massachusetts USA
11. Pediatric Hematology and Oncology, Children's Hospital Eberhard‐Karls‐Universitaet Tübingen Tübingen Germany
12. Clinic of Pediatrics Dortmund Municipal Hospital Dortmund Germany
13. Hematology‐Oncology Division Department of Pediatrics Padova University Hospital Padua Italy
14. University Children Hospital Bratislava Slovakia
15. Pediatric Hematology Unit Kaplan Medical Center Rehovot Israel
16. Department of Hematology and Oncology, University Clinic for Children`s Diseases, Medical Faculty Ss Cyril and Methodius University of Skopje Skopje Republic of North Macedonia
17. Dmitry Rogachev National Medical Research Center of Pediatric Hematology Oncology and Immunology Moscow Russia
18. Department of Pediatric Hematology and Oncology Félix Guyon University Hospital St Denis Réunion Island France