1 The Royal Marsden Hospital and The Institute of Cancer Research, Sutton, UK.
2 Hematology Oncology Division, Department of Women's and Children's Health, University of Padova, Padova, Italy.
3 Department of Pediatric and Adolescent Oncology, National Institute of Health and Medical Research Unit 1015, Gustave Roussy, Université Paris-Saclay, Villejuif, France.
4 Pathology Unit, Department of Laboratories, Bambino Gesu Children's Hospital, IRCCS, Rome, Italy.
5 Ruth Rappaport Children's Hospital, Rambam Medical Center, Joan and Sanford Weill Pediatric Hematology Oncology and Bone Marrow Transplantation Division, Haifa, Israel.
6 Radiation Oncology, Gustave Roussy Cancer Campus, Villejuif, France.
7 Department of Pediatric Surgery, Royal Manchester Children's Hospital, Manchester, UK.
8 Hôpital Universitaire des Enfants Reine Fabiola, l'Université Libre de Bruxelles, Brussels, Belgium.
9 Pediatric Oncology Department, National Cancer Institute, Rio de Janeiro, Brazil.
10 Pediatric Oncology Unit, Fondazione IRCCS Istituto Nazionale Tumori, Milano, Italy.
11 Center for Rare Disorders, Division of Pediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway.
12 Department of Pediatric Oncology and Hematology, Hospital Universitari Vall d'Hebron, Barcelona, Spain.
13 Princess Máxima Center for Pediatric Oncology, Utrecht, the Netherlands.
14 Pediatric Oncology Department University Hospital Brno and Faculty of Medicine Masaryk University, Brno, Czech Republic.
15 SIREDO Oncology Center, Institut Curie, Paris Sciences and Letters University, Paris, France.
16 Department of Radiotherapy, Hospital Universitari Vall d'Hebron, Barcelona, Spain.