1. Hematology‐Oncology Division, Department of Women's and Children's Health Padova University Hospital Padua Italy
2. Department of Pediatric Surgery, Hôpital Necker‐Enfants Malades Université de Paris Paris France
3. Department of Pediatrics, Hematology and Oncology Medical University of Gdansk Gdansk Poland
4. Department of Paediatric and Adolescent Oncology, INSERM U1015, Gustave Roussy Université Paris‐Saclay Villejuif France
5. Pediatric Oncology Unit Fondazione IRCCS Istituto Nazionale dei Tumori di Milano Milan Italy
6. Department of Pediatric Surgery Marciniak Hospital Wroclaw Poland
7. Department of Genetics, Institut Curie Paris Sciences Lettres Research University Paris France
8. Department of Pediatric Surgery Hôpital Femme Mère Enfant Lyon France
9. Radiotherapy Department Institut Curie Paris France
10. Clinic of Pediatrics Dortmund Municipal Hospital Dortmund Germany
11. Pediatric Hematology‐Oncology Department, Centre Hospitalier Universitaire Saint‐Denis de La Réunion Saint‐Denis France
12. Pediatric Oncology‐Hematology Unit University Hospital of Cruces Barakaldo‐Bizkaia Spain
13. Department of Hematology and Oncology University Children's Hospital University of Belgrade Belgrade Serbia
14. University Medical Centre Ljubljana Slovenia
15. Department of Pediatric Hematology and Oncology National Institute of Children's Diseases and Comenius University Bratislava Bratislava Slovakia
16. Clinic of Pediatrics, Institute of Clinical Medicine, Faculty of Medicine Vilnius University Vilnius Lithuania
17. Department of Hematology and Oncology University Clinic for Children's Diseases Medical Faculty, Ss Cyril and Methodius University of Skopje Skopje North Macedonia
18. Oncopediatric Department Oncology Institute “Prof. Dr. Ion Chiricuta,” Cluj‐Napoca Romania
19. Oncology Department P. and A. Kyriakou Children's Hospital Athens Greece
20. Pediatric Hematology Unit Kaplan Medical Center Rehovot Israel
21. Department of Pediatrics, Clinical Hospital Center Rijeka University of Rijeka Rijeka Croatia
22. Pediatrics 5 (Oncology, Hematology, Immunology), Klinikum Stuttgart ‐ Olgahospital Stuttgart Cancer Center Stuttgart Germany
23. International PPB/DICER1 Registry, Cancer and Blood Disorders Children's Minnesota Minneapolis Minnesota USA
24. Pediatric Hematology and Oncology, Children's Hospital Eberhard‐Karls‐Universitaet Tuebingen Tuebingen Germany
25. SIREDO Oncology Center (Care, Innovation and Research for Children, Adolescents and Young Adults with Cancer), Institut Curie PSL University Paris France