1. Pediatric Oncology UnitDepartment of Medical Oncology and HematologyFondazione IRCCS Istituto Nazionale dei Tumori Milano Italy
2. Pediatric Onco‐HaematologyStem Cell Transplantation and Cellular Therapy DivisionRegina Margherita Children's HospitalAzienda Ospedaliera‐Universitaria Città della Salute e della Scienza Torino Italy
3. Department of PathologyChildren's Hospital of Pittsburgh of UPMC Pittsburgh Pennsylvania
4. Department of Medicine‐DIMEDPadova University Hospital Padova Italy
5. Soft Tissue and Bone PathologyHistopathology and Pediatric Pathology UnitDepartment of Diagnostic Pathology and Laboratory MedicineFondazione IRCCS Istituto Nazionale dei Tumori Milano Italy
6. Epidemiology and Biostatistics UnitIRCCS Istituto Giannina Gaslini Genova Italy
7. Neuro‐Oncology UnitDepartment of Pediatric Hematology/Oncology and Cellular and Gene TherapyBambino Gesù Children's Hospital Roma Italy
8. Hematology‐Oncology UnitDepartment of PediatricsUniversity of Bologna Bologna Italy
9. Hematology‐Oncology UnitDepartment of PediatricsInstitute of Maternal and Child HealthIRCCS Burlo Garofolo Trieste Italy
10. Pediatric Hematology Oncology UnitDepartment of PediatricsUniversity of Milano‐BicoccaMBBM Foundation Monza Italy
11. Department of Pediatric Hematology OncologyUniversity Children's Hospital “Ospedale dei Bambini”ASST Spedali Civili Brescia Italy
12. Department of Pediatric Hematology/OncologyFondazione IRCCS Policlinico San Matteo Pavia Italy
13. Università di Torino Torino Italy