1. Hematology/Oncology Ospedale Pediatrico Bambino Gesù IRCCS Rome Italy
2. SIREDO Oncology Center Institut Curie PSL University Paris France
3. Pediatric Oncology Unit Fondazione IRCCS Istituto Nazionale Tumori Milano Italy
4. Department of Pediatric and Adolescent Oncology Gustave‐Roussy Cancer Campus Université Paris‐Saclay Villejuif France
5. Princess Máxima Center for Pediatric Oncology Université Paris‐Saclay Utrecht The Netherlands
6. Department of Pediatric Oncology Institut d'Hematologie et d'Oncologie Pédiatrique,/Centre Léon Bérard Lyon France
7. Pediatric Oncology Royal Manchester Children's Hospital Manchester UK
8. Pediatric Oncology Unit Hospital Universitario Virgen del Rocío Sevilla Spain
9. Department of Pediatrics and Adolescent Medicine Rigshospitalet University of Copenhagen Copenhagen Denmark
10. Division Imaging&Cancer University Medical Center Utrecht The Netherlands
11. Pathology Department Ospedale Pediatrico Bambino Gesù IRCCS Rome Italy