1 Department of Pediatric Oncology and Hematology, Saarland University, Homburg, Germany. Electronic address: norbert.graf@uks.eu.
2 Department of Paediatric Haemato-Oncology, Centre Léon Bérard, Lyon, France.
3 Department of Pediatric Oncology and Hematology, Rigshospitalet, Copenhagen, Denmark.
4 Research Center, Instituto Nacional do Cancer, Rio de Janeiro, Brazil.
5 Department of Haematology and Oncology, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK.
6 Department of Pediatric Oncology and Hematology, Saarland University, Homburg, Germany.
7 Theodor-Boveri-Institute/Biocenter and Comprehensive Cancer Center Mainfranken, University of Würzburg, Würzburg, Germany.
8 Department of Pediatric Surgery, Marciniak Hospital, Fieldorfa 2, Poland; Department of Paediatric Traumatology and Emergency Medicine, Wroclaw Medical University, Wroclaw, Poland.
9 Developmental Biology and Cancer Research and Teaching Department, University College London Great Ormond Street Institute of Child Health, University College London, London, UK.
10 Department of Paediatric Oncology, Hospital Universitario Virgen del Rocío, Seville, Spain.
11 Department of Radiation Oncology, Saarland University, Homburg, Germany.
12 Childhood Cancer Research Unit, Karolinska Institutet, Stockholm, Sweden.
13 Pediatric Radiology Section, Department for Diagnostic and Interventional Radiology, University Hospital Heidelberg, Heidelberg, Germany.
14 Department of Medical Oncology and Hematology, Pediatric Oncology Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy.
15 Centre Oscar Lambret, Department of Children and AJA Oncology, Lille, France.
16 Princess Máxima Center for Pediatric Oncology, Utrecht, the Netherlands.
17 Department of Pediatric Oncology, Hôpital d'Enfants de la Timone, Marseille, France.
18 Department of Pathology, Sidra Medicine and Weill Cornell Medicine - Qatar, Doha, Qatar.